say it: STRAYN-jur
stranger is a noun meaning "anyone who does not belong in the environment in which they are found". It carries 2 recorded senses.
anyone who does not belong in the environment in which they are found
an individual that one is not acquainted with
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 stranger 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.