say it: pruh-JEK-tur
projector is a noun meaning "an optical device for projecting a beam of light". It carries 2 recorded senses.
an optical device for projecting a beam of light
an optical instrument that projects an enlarged image onto a screen
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 projector 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.