say it: BAHY-foh-kuhlz
bifocals is a noun meaning "(plural) eyeglasses having two focal lengths, one for near vision and the other for far vision". It carries one recorded sense.
(plural) eyeglasses having two focal lengths, one for near vision and the other for far vision
plural
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 bifocals 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.