say it: kahn-truh-BYOO-shuhn
contribution is a noun meaning "the effort contributed by a person in bringing about a result". It carries 5 recorded senses.
a voluntary gift (as of money or service or ideas) made to some worthwhile cause
act of giving in common with others for a common purpose especially to a charity
a writing for publication especially one of a collection of writings as an article or story
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 contribution 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.