uptake

uptake — noun

1. how quickly and through what mechanism a substance such as oxygen, a drug, or a

1.nounB2
Definition

how quickly and through what mechanism a substance such as oxygen, a drug, or a nutrient enters and becomes absorbed by a living body, tissue, or system

Example

The doctor measured Ramón's oxygen uptake during the exercise test.

collocation: oxygen uptake

After eating, Vivek's body showed a normal glucose uptake pattern.

Common collocations
  • oxygen uptake
  • glucose uptake
  • iron uptake
  • calcium uptake
  • nutrient uptake
  • drug uptake
  • uptake of nitrogen
  • uptake into cells
  • rate of uptake
  • increase uptake
  • reduce uptake
Synonyms
  • absorption

    more general term; 'absorption' covers liquids and gases being soaked up, while 'uptake' more often implies active transport into a biological system

  • intake

    focuses on the amount taken in through an opening (e.g., mouth, nose), not necessarily on what happens to it afterward

  • consumption

    emphasises using up a resource; 'uptake' can describe merely entering a system without being consumed

Antonyms
  • release

    the opposite process — a substance leaving the body or system

  • excretion

    the removal of waste products from the body, the functional opposite of nutrient uptake

Grammar Patterns

uptake of [substance]

[substance] uptake

uptake into [body/system]

Usage Note

Frequently appears in scientific and medical contexts where the substance being absorbed is named before or after 'uptake' (e.g., oxygen uptake, uptake of calcium). Often measured or quantified.

Common Mistakes

He has good uptake of the lesson.
He was quick on the uptake.
The absorption sense refers to physical substances, not mental learning; the mental meaning exists only in the fixed idiom 'quick/slow on the uptake.'

2. the rate or degree to which people begin to use or accept a new product, service

2.nounB2
Definition

the rate or degree to which people begin to use or accept a new product, service, technology, idea, or opportunity

Example

The uptake of electric cars has grown quickly across Europe this year.

collocation: uptake of [product/technology]

Vaccine uptake among young adults in Taipei reached over eighty percent.

collocation: vaccine uptake

Common collocations
  • vaccine uptake
  • technology uptake
  • digital uptake
  • uptake of electric cars
  • uptake of services
  • high uptake
  • low uptake
  • widespread uptake
  • increase uptake
  • boost uptake
  • measure uptake
  • rate of uptake
Synonyms
  • adoption

    more active — implies a deliberate choice to start using something; 'uptake' can be more passive or measured

  • acceptance

    emphasises the willingness to receive something; 'uptake' implies actual use, not just willingness

  • take-up

    British English variant with identical meaning; slightly less formal

Antonyms
  • rejection

    the decision not to use or accept something

  • resistance

    active opposition to adoption, often implying social or systemic barriers

Grammar Patterns

uptake of [product/technology/service]

[something] uptake

high/low uptake

Usage Note

Commonly used in business, public-health, and technology contexts with collective subjects (populations, markets, age groups). The rate is typically described as high, low, fast, slow, or widespread. Often paired with a quantifier (e.g., 'fifty percent uptake').

Idioms

be quick / slow on the uptake

idiom

to be able — or unable — to understand something quickly; to grasp new ideas or situations at a particular speed

The new student was quick on the uptake and finished the assignment before anyone else.

I'm sorry I did not get the joke — I can be a bit slow on the uptake sometimes.

be quick/slow on the uptake

idiom

This means someone understands things either very fast or very slowly.

Maya is quick on the uptake and finished the puzzle in minutes.

Why is Diego so slow on the uptake with these instructions?

Word family

Synonym discussion

Sense: noun/1

'Absorption' is the broadest term, describing any process where one substance is taken into another — a sponge absorbs water, the skin absorbs lotion. 'Uptake' is more specific to living systems and implies an active or regulated process (cells taking up glucose). 'Intake' focuses on the quantity brought in through an opening (food intake, air intake) without emphasising what happens internally. 'Consumption' adds the idea of using something up (energy consumption, fuel consumption). 'Assimilation' goes a step further — the absorbed substance is converted into usable components (the body assimilates iron into red blood cells). For everyday biology contexts, 'uptake' and 'absorption' are often interchangeable, but 'uptake' sounds more technical and process-oriented. Example: 'The patient's oxygen uptake improved after treatment' sounds natural; 'The patient's oxygen absorption improved' is also fine but slightly less precise for medical reporting.

absorption ↗intake ↗consumption ↗assimilation

Common collocations

Nouns

Adverbs

Phrases

  • rate of uptake
  • level of uptake
  • increase uptake
  • boost uptake
  • slow uptake
  • widespread uptake

Prepositions

Etymology

Middle EnglishModern English

'Uptake' formed in late Middle English (1400s) as a combination of 'up' and 'take', originally meaning the act of lifting or taking up. By the 1700s it had acquired its modern biological sense of absorbing substances into a living system. The figurative meaning — accepting or adopting an idea, product, or service — emerged in the mid-1900s alongside discussions of technology diffusion and public health campaigns. The idiomatic phrase 'quick/slow on the uptake' (meaning fast or slow to understand) dates from the early 1900s and draws on a different metaphor: 'taking up' an idea mentally.