overstrain definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
to put under very great strain; overwork
to exert great effort
overstrain definition by American Heritage Dictionary
verb o·ver·strained, o·ver·strain·ing, o·ver·strains verb, transitive
To subject to excessive strain, especially to force beyond a natural or proper limit: overstraining the environment.verb, intransitive
To put forth too much physical effort.