Less specifically, denoting the relation of being subject, of undergoing regard, treatment, or the like; as, a bill under discussion
If you study or work under a particular person, that person teaches you or tells you what to do. Kiefer was just one of the artists who had studied under Beuys in the early Sixties I am the new manager and you will be working under me
Denoting relation to some thing or person that is superior, weighs upon, oppresses, bows down, governs, directs, influences powerfully, or the like, in a relation of subjection, subordination, obligation, liability, or the like; as, to travel under a heavy load; to live under extreme oppression; to have fortitude under the evils of life; to have patience under pain, or under misfortunes; to behave like a Christian under reproaches and injuries; under the pains and penalties of the law; the condition under which one enters upon an office; under the necessity of obeying the laws; under vows of chastity
In a lower, subject, or subordinate condition; in subjection; used chiefly in a few idiomatic phrases; as, to bring under, to reduce to subjection; to subdue; to keep under, to keep in subjection; to control; to go under, to be unsuccessful; to fail
Lower in position, intensity, rank, or degree; subject; subordinate; generally in composition with a noun, and written with or without the hyphen; as, an undercurrent; undertone; underdose; under-garment; underofficer; undersheriff
If you do something under a particular name, you use that name instead of your real name. Were any of your books published under the name Amanda Fairchild? The patient was registered under a false name
If you go under something, you move from one side to the other of something that is at a higher level than you. He went under a brick arch A river boat passed under the bridge
located below or beneath something else; "nether garments"; "the under parts of a machine"
Something that is under a layer of something, especially clothing, is covered by that layer. I was wearing two sweaters under the green army jacket It was hard to see the colours under the layer of dust