The Collaborative International Dictionary
Exert \Ex*ert"\, v. t. [imp. & p. p. Exerted; p. pr. & vb. n. Exerting.] [L. exertus, exsertus, p. p. of exerere, exserere, to thrust out; ex out + serere to join or bind together. See Series, and cf. Exsert.]
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To thrust forth; to emit; to push out. [Obs.]
So from the seas exerts his radiant head The star by whom the lights of heaven are led.
--Dryden. To put force, ability, or anything of the nature of an active faculty; to put in vigorous action; to bring into active operation; as, to exert the strength of the body, limbs, faculties, or imagination; to exert the mind or the voice.
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To put forth, as the result or exercise of effort; to bring to bear; to do or perform.
When we will has exerted an act of command on any faculty of the soul or member of the body.
--South.To exert one's self, to use efforts or endeavors; to strive; to make an attempt.