say it: GAYT-kee-pur
gatekeeper is a noun meaning "someone who controls access to something". It carries 2 recorded senses.
someone who controls access to something
“there are too many gatekeepers between the field officers and the chief”
someone who guards an entrance
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 gatekeeper 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.