The noun GAPE has 2 senses: 1. an expression of openmouthed astonishment. 2. a stare of amazement (usually with the mouth open). Familiarity information: GAPE used as a noun is rare.• GAPE (verb). The verb GAPE has 2 senses: 1. look with amazement; look stupidly. 2. be wide open. Familiarity information: GAPE used as a verb is rare.he noun GAPE has 2 senses: 1. an expression of openmouthed astonishment. 2. a stare of amazement (usually with the mouth open). Familiarity information: GAPE used as a noun is rare.