Adjective under has 2 senses
- nether, under - located below or beneath something else; "nether garments"; "the under parts of a machine"
Antonym: high (indirect, via low)
- under - lower in rank, power, or authority; "an under secretary"
Antonym: dominant (indirect, via subordinate)
,
Adverbial under has 8 senses
- under - down to defeat, death, or ruin; "their competitors went under"
- under - through a range downward; "children six and under will be admitted free"
- under - into unconsciousness; "this will put the patient under"
- under - in or into a state of subordination or subjugation; "we must keep our disappointment under"
- under - below some quantity or limit; "fifty dollars or under"
- under - below the horizon; "the sun went under"
- under - down below; "get under quickly!"
- under, below - further down; "see under for further discussion"
,