Definition of under:

part of speech: adverb

A prefix signifying " that which is less than right or ordinary"; that which is inferior or subordinate to something else; lower in rank or degree. Note.- All the possible compounds of under are not given, but only those which are most common. The roots of the compounds of under may be ascertained by consulting the dictionary for the separate parts. Under is not usually separated by a hyphen, and is sometimes prepositional, as underground, and sometimes adverbial, as underdone.

part of speech: adverb

In a lower or subordinate condition; in subjection.

part of speech: preposition

Beneath or below, so as to have something over or above; in a state of subjection to; less than; by the show or pretence of, as under the disguise of a friend; denoting rank or order of precedence, as, none were present under the rank of a baron; in a state of oppression by; in the state of being known by; in the state of; attested by, as under his own hand.

part of speech: adjective

Lower in rank or degree; subordinate; to knock under, to yield; to submit.

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