1 beneath, below, underneath, covered by:
What is under that blanket? The wreck lies a mile under the surface.
2 subordinate to, answerable to, inferior to, second to, secondary to, subservient to, below, beneath, underneath, junior to, directed or supervised or controlled by, under (the) control of, at the mercy of, at the beck and call of:
The bashibazouks were under the sultan's top officers.
3 included or comprised in or under, subsumed under:
This should be under the heading, 'What is the Stupidest Thing you have done Today?' Under which category is 'Software'?
4 under the aegis or protection or eye or guardianship or care of:
The prince was trained under the grand vizier.
5 less than, lower than:
I paid under $200 for my VCR.
6 under the influence. drunk, tipsy, high, impaired:
The police charged him with driving while under the influence.
7 below, underneath, beneath:
You looked on top of the bed, but have you looked under?
8 underwater, beneath the waves, down, out of sight:
We watched helpless as he went under for the third time.