from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To give or take mutually; interchange.
- transitive v. To show, feel, or give in response or return.
- intransitive v. To move back and forth alternately.
- intransitive v. To give and take something mutually.
- intransitive v. To make a return for something given or done.
- intransitive v. To be complementary or equivalent.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To mutually give and take something; to interchange.
- v. To give something in response.
- v. To move backwards and forwards, like a piston.
- v. To counter, retort or retaliate.
from the GNU version of the Collaborative International Dictionary of English
- intransitive v. To move forward and backward alternately; to recur in vicissitude; to act interchangeably; to alternate.
- transitive v. To give and return mutually; to make return for; to give in return; to interchange; to alternate.
from The Century Dictionary and Cyclopedia
- To cause to move back and forth; give an alternating motion to.
- To give and return mutually; yield or perform each to each; interchange: as, to reciprocate favors.
- To give or do in response; yield a return of; requite correspondingly.
- To move backward and forward; have an alternating movement; act interchangeably; alternate.
- To act in return or response; do something equivalent or accordant: as, I did him many favors, but he did not reciprocate.
- In mathematics, to take the reciprocal of.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. act, feel, or give mutually or in return
- v. alternate the direction of motion of
Latin reciprocāre, reciprocāt-, to move back and forth, from reciprocus, alternating; see reciprocal.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin reciprocātus, past participle of reciprocāre ("to move back and forth"). (Wiktionary)