maintain

verb main·tain \mān-ˈtān, mən-\

: to cause (something) to exist or continue without changing

: to keep (something) in good condition by making repairs, correcting problems, etc.

: to continue having or doing (something)

Full Definition of MAINTAIN

transitive verb

: to keep in an existing state (as of repair, efficiency, or validity) : preserve from failure or decline <maintain machinery>

: to sustain against opposition or danger : uphold and defend <maintain a position>

: to continue or persevere in : carry on, keep up <couldn't maintain his composure>

a : to support or provide for <has a family to maintain>

b : sustain <enough food to maintain life>

: to affirm in or as if in argument : assert <maintained that the earth is flat>

— main·tain·abil·i·ty \-ˌtā-nə-ˈbi-lə-tē\ noun

— main·tain·able \-ˈtā-nə-bəl\ adjective

— main·tain·er noun

See maintain defined for English-language learners

See maintain defined for kids

Origin of MAINTAIN

Middle English mainteinen, from Anglo-French maintenir, maynteiner, from Medieval Latin manutenēre, from Latin manu tenēre to hold in the hand

First Known Use: 14th century

Related to MAINTAIN

Synonyms: conserve, keep up, preserve, save

Antonyms: deny, gainsay

Synonym Discussion of MAINTAIN

maintain, assert, defend, vindicate, justify mean to uphold as true, right, just, or reasonable. maintain stresses firmness of conviction <steadfastly maintained his innocence>. assert suggests determination to make others accept one's claim <asserted her rights>. defend implies maintaining in the face of attack or criticism <defended his voting record>. vindicate implies successfully defending <his success vindicated our faith in him>. justify implies showing to be true, just, or valid by appeal to a standard or to precedent <the action was used to justify military intervention>.

MAINTAINABLE Defined for Kids