say it: kuh-lab-ur-AY-shuhn
collaboration is a noun meaning "act of working jointly". It carries 2 recorded senses.
act of working jointly
“they worked either in collaboration or independently”
act of cooperating traitorously with an enemy that is occupying your country
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for collaboration come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.