To put to use or effect; put forth.
Exerted all my strength to move the box.
To bring to bear; exercise.
To put (oneself) to strenuous effort.
Exerted ourselves mightily to raise funds.
To put forth or use energetically; put into action or use.
To exert strength, influence, etc.
To apply (oneself) with great energy or straining effort.
Exert is defined as to put forth or into use with great energy.
An example of exert is to put lots of energy into exercising.
Origin of exert
Latin exserere exsert- to put forth, stretch out ex- ex- serere to join ser-2 in Indo-European roots