say it: SEV-uhnth
seventh is a noun and adjective meaning "position seven in a countable series of things". It carries 4 recorded senses.
position seven in a countable series of things
one part in seven equal parts
the musical interval between one note and another seven notes away from it
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 seventh 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.