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English definition of “under”

under

preposition  /ˌʌn·dər/ us  

under preposition (LOWER POSITION)

in or to a position below or lower than (something else), often so that one thing covers the other: Our dog hides under the bed whenever we have a lightning storm. She was holding the umbrella under her arm (= between her upper arm and the side of her chest).

under preposition (LESS THAN)

less than: The price is still under a dollar. Scholarship candidates must be under 21 and plan to attend college in the fall.

under preposition (EXPERIENCING)

in the process of, influenced or controlled by, or according to: Construction had to be done under difficult conditions. Under current law, stores in this town can’t do business on Sunday. We liked working under her because she made us feel appreciated. "Where can I find books on swimming?" "Look under sports (= within the subject of sports)." We seemed to be under attack (= in the process of being attacked) by a swarm of bees. Your request for a transfer to our Denver office is under consideration (= being considered). I was under the impression (= I believed) that she was married. I find it difficult to work under pressure (= with this influence).
(Definition of under preposition from the Cambridge Academic Content Dictionary © Cambridge University Press)
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