Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “under”


preposition (LESS THAN)    /ˈʌn.dər/ US  /-dɚ/
A2 less than: All items cost /are under a pound . The discount applies only to children under (the age of) ten (= younger than ten). If you get under 50 percent , you've failed the exam . → Opposite overSmall in number and quantity overGrammar:Beneath, under or below?Beneath has a meaning similar to under and below but we do not use it with numbers:Grammar:UnderUnder is a preposition. When we use under as a preposition, it is similar to below. We use under to talk about something that is below or lower than something else:
(Definition of under preposition (LESS THAN) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of under

Definitions of “under” in other dictionaries

Word of the Day


a skilled and trained cook who works in a hotel or restaurant, especially the most important cook

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More