verb (used without object), collaborated, collaborating.
to work, one with another; cooperate, as on a literary work: They collaborated on a novel.
to cooperate, usually willingly, with an enemy nation, especially with an enemy occupying one's country: He collaborated with the Nazis during World War II.

1870–75; < Late Latin collabōrātus (past participle of collabōrāre), equivalent to col- col-1 + labor work + -ātus -ate1

collaborator, noun

collaborate, corroborate.

2. collude, join, assist, abet. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
collaborate (kəˈlæbəˌreɪt)
vb (often foll by on, with, etc)
1.  to work with another or others on a joint project
2.  to cooperate as a traitor, esp with an enemy occupying one's own country
[C19: from Late Latin collabōrāre, from Latin com- together + labōrāre to work]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1871, back-formation from collaborator (1802), from Fr. collaborateur, from L. collaboratus, pp. of collaborare "work with," from com- "with" + labore "to work."
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
If a group has three students, have each student make one map and then ask the
  entire group to collaborate on the fourth map.
To him, environmental conservation can succeed only if vying factions
  communicate and collaborate.
Students will collaborate to research the history and implications of trade and
  write about and present their findings.
Students can draw the pictures individually or collaborate with group members
  to create larger posters or murals.
Related Words
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