from The American Heritage® Dictionary of the English Language, 4th Edition
- intransitive v. To work together, especially in a joint intellectual effort.
- intransitive v. To cooperate treasonably, as with an enemy occupation force in one's country.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To work together with others to achieve a common goal.
- v. To voluntarily cooperate treasonably, as with an enemy occupation force in one's country.
from the GNU version of the Collaborative International Dictionary of English
- intransitive v. to work together with another toward a common goal, especially in an intellectual endeavor.
- intransitive v. to willingly cooperate with an enemy, especially an enemy nation occupying one's own country.
from The Century Dictionary and Cyclopedia
- To work with another or others; coöperate with another or others in doing or producing something; especially, to work with another in a literary production or a scientific investigation.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. work together on a common enterprise of project
- v. cooperate as a traitor
Late Latin collabōrāre, collabōrāt- : Latin com-, com- + Latin labōrāre, to work (from labor, toil).(American Heritage® Dictionary of the English Language, Fourth Edition)
From collaborator, from French collaborateur, from Latin collaborare (Wiktionary)