Entry 2 senses · 2 variants Webster, 1913 Nigerien · IPA /naɪˌdʒɪɹiˈɛn/ prop. adj. prop. n. 01 prop. adj. Of, pertaining to, or characteristic of the inhabitants of Niger. 1. Of, pertaining to, or characteristic of the inhabitants of Niger. Syn. Nigerian. 02 prop. n. A native or inhabitant of Niger. 1. A native or inhabitant of Niger.