Entry 3 senses · 2 variants Webster, 1913 Excipient · Ex·cip·i·ent · IPA /ɪkˈsɪpɪənt/ a. n. 01 a. Taking an exception. 1. Taking an exception. 02 n. An exceptor. 1. An exceptor.[R.] 2. An inert or slightly active substance used in preparing remedies as a vehicle or medium of administration for the medicinal agents.(Med., Pharmacy)