reflection

reflection — noun

1. A picture of a person, object, or scene that you see when light bounces off a sm

1.nounA2
Definition

A picture of a person, object, or scene that you see when light bounces off a smooth, shiny surface such as a mirror, window, or still water.

Example

Layla checked her reflection in the shop window and adjusted her jacket.

The reflection of the old church appeared clearly on the calm surface of the lake.

reflection + of + noun phrase across a surface

Common collocations
  • one's reflection
  • see one's reflection
  • catch one's reflection
  • reflection in the mirror
  • reflection on water
Synonyms
  • image

    more general; any visual likeness, not necessarily from a reflective surface

  • likeness

    formal and less common; emphasizes resemblance rather than the optical process

Grammar Patterns

see one's reflection

reflection + in + mirror/water/glass

reflection + of + noun

Common Mistakes

I saw my reflect in the mirror.
I saw my reflection in the mirror.
the noun form 'reflection' is needed, not the verb 'reflect'.

2. The process in which rays or waves, such as light, sound, or heat, strike a surf

2.nounB1
Definition

The process in which rays or waves, such as light, sound, or heat, strike a surface and are sent back rather than moving through or being absorbed.

Example

Kemi wore sunglasses because the reflection from the white sand was too bright.

Scientists use the reflection of sound waves to create maps of the ocean floor.

reflection + of + [type of wave] + for [purpose]

Common collocations
  • reflection of light
  • reflection of heat
  • reflection of sound
  • surface reflection
  • waves undergo reflection
Synonyms
  • bounce-back

    informal; used in everyday language rather than in scientific contexts

Antonyms
  • absorption

    the opposite process, where energy is taken in rather than sent back

Grammar Patterns

reflection + of + light/heat/sound + from + surface

surface reflection

Common Mistakes

The reflection of the mirror is very strong.
The reflection from the mirror is very strong.
use 'from' (not 'of') for the surface that sends back energy.

3. The measurement of the angle between a ray leaving a reflective surface and an i

3.nounC1
Definition

The measurement of the angle between a ray leaving a reflective surface and an imaginary line at a right angle to that surface.

Example

Rania shone a flashlight at the mirror and measured the reflection angle with a protractor.

concrete demonstration: shine light at mirror + measure with protractor

Ramón adjusted the laser and calculated the reflection angle with a protractor.

Common collocations
  • angle of reflection
  • reflection angle
  • the angle of reflection equals
Antonyms

Grammar Patterns

angle of reflection

the reflection angle

Usage Note

Almost always used with a definite article ('the angle of reflection') in physics writing. Singular only; the specific angle under discussion at a given point.

Common Mistakes

The angle of reflection of the mirror was 30 degrees.
The light had an angle of reflection of 30 degrees.
the angle belongs to the ray, not to the mirror.

4. A sign, result, or clear example that shows what something is like or what has c

4.nounB1
Definition

A sign, result, or clear example that shows what something is like or what has caused a particular situation.

Example

Her high test scores were a direct reflection of the hours she spent studying.

be + a + reflection + of + noun phrase

The rising number of tourists in the town is a reflection of its growing popularity.

Common collocations
  • a reflection of
  • a direct reflection of
  • an accurate reflection of
  • a true reflection of
Synonyms
  • indication

    more neutral; suggests a clue or piece of evidence rather than a full picture

  • demonstration

    stronger; implies the result clearly and deliberately shows something

Grammar Patterns

be + a + reflection + of + noun phrase

a reflection of

Usage Note

Nearly always followed by the preposition 'of' plus a noun or noun phrase explaining what is being shown or indicated. Usually singular and used with 'a' or 'the'.

Common Mistakes

The test results are reflection of the students.
The test results are a reflection of the students' effort.
a countable use of 'reflection' in this sense needs the article 'a' or 'the' before it.

5. The activity of thinking carefully, seriously, and often for a long time about s

5.nounB1
Definition

The activity of thinking carefully, seriously, and often for a long time about something — for example, reflecting on a past decision, a moral question, or the meaning of an experience.

Example

After a week of quiet reflection, Charlotte decided to accept the job offer in Tokyo.

period of + reflection + before + decision

The book is a collection of the author's personal reflections on friendship and loss.

Common collocations
  • quiet reflection
  • deep reflection
  • on reflection
  • moment of reflection
  • personal reflections
Synonyms
  • contemplation

    more formal; stresses sustained, calm attention to something, often spiritual or philosophical

  • meditation

    implies deeper, more disciplined mental focus, often with a spiritual dimension

Grammar Patterns

in + reflection

on + reflection

reflection + on/upon + noun

reflections + on + topic

Usage Note

In countable use (plural 'reflections'), the word refers to a specific thought or comment that comes from careful consideration. In uncountable use, it describes the general mental activity of reflecting.

Common Mistakes

I did a reflection about my childhood.
I did some reflection on my childhood.
use 'on' (not 'about') after 'reflection' in this sense, or 'on/upon' with the verb form.

6. A result or effect of someone's actions that causes other people to form a negat

6.nounB2
Definition

A result or effect of someone's actions that causes other people to form a negative opinion about that person or about the group, institution, or family they belong to.

Example

The team's poor sportsmanship during the match was a bad reflection on the whole school.

be + a bad reflection + on + [group noun]

Otis worried that losing his temper at work would be a reflection on his family.

Common collocations
  • a bad reflection on
  • a poor reflection on
  • a terrible reflection on
Synonyms
  • discredit

    stronger and more formal; directly implies harm to reputation

  • stigma

    a mark of shame that lasts; more severe than 'reflection'

Antonyms
  • credit

    something that brings honour or a good reputation

Grammar Patterns

be + a + reflection + on + noun phrase

a bad/poor reflection on

Usage Note

Frequently used with an adjective such as 'bad', 'poor', 'terrible', or 'negative' before 'reflection', and always followed by the preposition 'on' plus the person or group that is judged. Almost never used in a positive sense without special context ('good reflection on').

Common Mistakes

His actions were a reflection of the school' (when meaning damage to reputation).
His actions were a bad reflection on the school.
use 'on' (not 'of') to indicate whose reputation is harmed, and include a negative adjective.

Word family

  • reflect
    verbB1
  • reflective
    adjectiveB2
  • reflectively
    adverbC1
  • reflector
    nounB2
  • reflectance
    nounC2
  • unreflective
    adjectiveC1

Synonym discussion

Sense: noun/5

All four words describe focused thought, but they differ in depth, duration, and emotional tone. 'Reflection' is the broadest term — it suggests thoughtful consideration directed at a past event, an idea, or a decision, often with the goal of understanding it better ('After some reflection, she saw where she had gone wrong'). 'Contemplation' is more formal and sustained; it implies looking at something from all sides, sometimes with a spiritual or philosophical dimension. 'Meditation' suggests a disciplined mental practice — clearing the mind or concentrating on a single thing — and is often associated with spiritual traditions. 'Pondering' is more casual and concrete; you ponder a practical problem like which route to take, and the thinking may be slower and more hesitant. 'Rumination' has a negative connotation: it means repeatedly going over the same distressing thought without reaching a resolution. For example: 'Joon's reflection on the meeting led to useful insights,' while 'His rumination on the same criticism only made him feel worse.'

contemplation ↗meditation ↗ponderingrumination

Common collocations

Nouns

Phrases

  • angle of reflection
  • on reflection
  • moment of reflection

Prepositions

Etymology

LatinFrenchEnglish

The word 'reflection' entered English in the late 1300s from Old French 'reflexion', which came from Late Latin 'reflexio' — a 'bending back'. The Latin verb 'reflectere' is a combination of 're-' ('back') and 'flectere' ('to bend'). At first it meant only the physical act of light or an object being bent back from a surface. By the 1600s, people were using it for the mental act of 'bending' one's thoughts back onto past events or ideas — a metaphor that still feels natural today.