say it: groop
group is a noun and verb meaning "any number of entities (members) considered as a unit". It carries 5 recorded senses.
any number of entities (members) considered as a unit
(chemistry) two or more atoms bound together as a single unit and forming part of a molecule
chemistry
a set that is closed, associative, has an identity element and every element has an inverse
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 group 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.