say it: kah-luh-KAY-shuhn
collocation is a noun meaning "a grouping of words in a sentence". It carries 2 recorded senses.
a grouping of words in a sentence
the act of positioning close together (or side by side)
“it is the result of the juxtaposition of contrasting colors”
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 collocation 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.