say it: LAHN-juh-tood
longitude is a noun meaning "the angular distance between a point on any meridian and the prime meridian at Greenwich". It carries one recorded sense.
the angular distance between a point on any meridian and the prime meridian at Greenwich
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 longitude 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.