Entry 1 sense Webster, 1913 Secretariat /sĕkˌ-rĭt-ĕr'-ē-ət/ · Sec·re·ta·ri·at · IPA /ˌsɛk.ɹəˈtɛɚ.i.ət/ 01 n. The office of a secretary; the place where a secretary transacts business, keeps records, etc. 1. The office of a secretary; the place where a secretary transacts business, keeps records, etc.