reinforcement

reinforcement — noun

1. the process of making an existing idea, belief, or behaviour stronger, especiall

1.nounB2
Definition

the process of making an existing idea, belief, or behaviour stronger, especially by adding evidence, praise, or repetition

Example

The teacher's praise served as reinforcement for the children's efforts in class.

served as + reinforcement + for (abstract use)

Sahil only read news that confirmed his opinions, giving his political beliefs constant reinforcement.

Common collocations
  • positive reinforcement
  • steel reinforcement
  • structural reinforcement
  • reinforcement of beliefs
  • emotional reinforcement
  • constant reinforcement
Synonyms
  • strengthening

    more general and slightly less formal than reinforcement

  • support

    broader meaning; can be emotional or structural without necessarily making stronger

  • bolstering

    more emphatic, often used for abstract things like confidence or morale

Antonyms
  • weakening

    the opposite process of making something less strong or effective

Grammar Patterns

reinforcement + of + noun phrase

Usage Note

Can be uncountable when referring to the process (the reinforcement of good habits) or countable when referring to a specific instance of strengthening (each compliment was a reinforcement of her confidence). Typically used with abstract ideas, beliefs, feelings, and behaviour patterns.

Common Mistakes

The coach gave reinforcement to the team.
The coach's words served as reinforcement for the team's confidence.
'Reinforcement' is typically the effect or the material itself, not something directly 'given' as a gift.

2. additional soldiers, police officers, or military equipment sent to help a force

2.nounB2
Definition

additional soldiers, police officers, or military equipment sent to help a force that needs more people or resources

Example

The commander called for reinforcements as soon as the enemy attack began.

call for + reinforcements

Police reinforcements arrived on the scene just as the protest was growing larger.

Common collocations
  • call for reinforcements
  • send reinforcements
  • police reinforcements
  • military reinforcements
  • arrival of reinforcements
  • wait for reinforcements
Synonyms
  • backup

    informal and broader; can refer to any situation where extra help is needed

  • reserves

    troops kept in readiness but not yet deployed; narrower meaning

Grammar Patterns

call for + reinforcements

send + reinforcements

arrival of + reinforcements

Usage Note

Almost always used in the plural form (reinforcements) when referring to additional troops or police. The singular is uncommon in this military/police sense.

Common Mistakes

The army sent reinforcement to the border.
The army sent reinforcements to the border.
In the military sense, the plural form reinforcements is the standard usage.

3. a material or device added to a structure or object to give it extra strength, e

3.nounB2
Definition

a material or device added to a structure or object to give it extra strength, especially in building, engineering, or manufacturing

Example

The concrete wall contains steel reinforcement to prevent cracks from forming.

steel + reinforcement (material collocation)

Fiberglass reinforcement was added to the boat hull to make it more durable.

Common collocations
  • steel reinforcement
  • fiberglass reinforcement
  • concrete reinforcement
  • metal reinforcement
  • structural reinforcement
  • additional reinforcement
Synonyms
  • brace

    a specific device that holds parts in position; narrower and more concrete than reinforcement

  • stiffener

    a technical term for something that reduces flexibility in a structure

Grammar Patterns

noun + reinforcement

reinforcement + for + noun

Usage Note

Often used without an article when referring to a type of material in general (steel reinforcement). Countable when pointing to a specific object or device (a metal reinforcement was installed in the beam).

Common Mistakes

I added reinforcement to make it stronger.
I added steel reinforcement to the concrete to make it stronger.
When referring to physical material, specify what type of reinforcement is used.

4. in psychology, a stimulus, reward, or response that makes a person or animal mor

4.nounC1
Definition

in psychology, a stimulus, reward, or response that makes a person or animal more likely to repeat a particular behavior in the future

Example

Positive reinforcement, such as giving a child a treat for completing homework, builds good habits.

positive + reinforcement (key technical distinction)

The dog trainer used food as reinforcement to teach the puppy to sit and stay.

Common collocations
  • positive reinforcement
  • negative reinforcement
  • reinforcement schedule
  • behavioral reinforcement
  • primary reinforcement
  • secondary reinforcement
Synonyms
  • reward

    non-technical and broader; lacks the formal theoretical framework that reinforcement has in psychology

  • reinforcer

    the technical term for the specific stimulus that produces reinforcement

Antonyms
  • punishment

    the opposite process in behavior modification — it decreases the likelihood of a behavior being repeated

Grammar Patterns

positive + reinforcement

negative + reinforcement

reinforcement + of + behavior

Usage Note

In psychology, positive reinforcement means adding a desirable stimulus to increase a behavior. Negative reinforcement means removing an unpleasant stimulus to increase a behavior. Both increase the target behavior — this is a common point of confusion for learners who think 'negative reinforcement' means punishment.

Common Mistakes

Negative reinforcement is the same as punishment.
Negative reinforcement increases a behavior by removing something unpleasant, while punishment decreases a behavior by adding something unpleasant.
These two concepts are opposites in behavior modification theory.

Word family

  • reinforce
    verbB2
  • reinforced
    adjectiveB2
  • reinforcing
    adjectiveB2
  • reinforcer
    nounC1

Synonym discussion

Sense: noun/1

While all four words involve making something stronger, they differ in scope and typical use. Strengthen is the most general term — you can strengthen anything from a muscle to a relationship to a wall (e.g., 'She strengthened her argument with new data'). Bolster often means to support something that is already weak or under threat, frequently in abstract contexts like confidence or morale (e.g., 'The good news bolstered the team's spirits'). Fortify carries a sense of defense against attack, whether literal (fortifying a castle) or figurative (fortifying oneself against criticism). Reinforce specifically implies that something already there is being made stronger by adding to it — you reinforce an existing wall, an existing belief, or an existing behavior. For example: 'The army reinforced its positions overnight' versus 'The army fortified its positions overnight' — reinforce suggests adding more to what is already there, while fortify suggests making the existing structure more resistant.

strengthen ↗bolsterfortifyreinforce ↗

Common collocations

Nouns

Adverbs

Phrases

  • in reinforcement of

Prepositions

Etymology

LatinFrenchEnglish

The word 'reinforcement' is formed from the verb 'reinforce' (to make stronger) plus the noun suffix '-ment'. 'Reinforce' itself comes from 're-' meaning 'again' and 'inforce', an earlier form of 'enforce' meaning 'to strengthen'. 'Inforce' was borrowed from Old French 'enforcier', which traces back to Latin 'fortis' meaning 'strong'. So the word literally carries the sense of 'making strong again'.