1 under | Definition of under

under

adverb
un·​der | \ ˈən-dÉ™r How to pronounce under (audio) \

Definition of under

 (Entry 1 of 3)

1 : in or into a position below or beneath something
2 : below or short of some quantity, level, or limit $10 or under often used in combination understaffed
3 : in or into a condition of subjection, subordination, or unconsciousness put the patient under for surgery
4 : down to defeat, ruin, or death weaker competitors will be forced under
5 : so as to be covered buried under by the avalanche

under

preposition

Definition of under (Entry 2 of 3)

1 : below or beneath so as to be overhung, surmounted, covered, protected, or concealed by under sunny skies a soft heart under a stern exterior under cover of darkness
2a : subject to the authority, control, guidance, or instruction of served under the general under the terms of the contract a program that runs under any operating system
b : receiving or undergoing the action or effect of under pressure courage under fire under the influence of alcohol the image of a point under a mapping under oath
3a : within the group or designation of under this heading
b : having as name or title traveling under an alias
4 : less or lower than (as in size, amount, or rank) especially : falling short of a standard or required degree under the legal age under par