Entry 3 senses · 2 variants Webster, 1913 Excommunicate /ĕkˌ-skəm-yo͞on'-ək-ātˌ/ · Ex·com·mu·ni·cate · IPA /ˌɛkskəˈmjunəkeɪt/ a. v. t. 01 a. Excommunicated; interdicted from the rites of the church. 1. Excommunicated; interdicted from the rites of the church. “Thou shalt stand cursed and excommunicate.” — Shak. 02 v. t. To put out of communion; especially, to cut off, or shut out, from communion with the church, by an ecclesiastical sentence. imp. & p. p. Excommunicated; p. pr. & vb. n. Excommunicating 1. To put out of communion; especially, to cut off, or shut out, from communion with the church, by an ecclesiastical sentence. 2. To lay under the ban of the church; to interdict. “Martin the Fifth . . . was the first that excommunicated the reading of heretical books.” — Miltin.