Entry 1 sense Webster, 1913 Sylphid · Sylph·id · IPA /ˈsɪlfɪd/ 01 n. A little sylph; a young or diminutive sylph. 1. A little sylph; a young or diminutive sylph. “Ye sylphs and sylphids, to your chief give ear, Fays, fairies, genii, elves, and demons, hear.” — Pope.