'Neigh' definitions:

Definition of 'neigh'

noun

The characteristic sounds made by a horse [syn: neigh, nicker, whicker, whinny]

verb

Make a characteristic sound, of a horse [syn: neigh, nicker, whicker, whinny]

From: GCIDE

Neigh \Neigh\ (n[=a]), v. i. [imp. & p. p. Neighed (n[=a]d); p. pr. & vb. n. Neighing.] [OE. neien, AS. hn[=ae]gan, prob. of imitative origin; cf. MHG. n[=e]gen, Icel. hneggja, gneggja, Sw. gn[aum]gga. Cf. Nag a horse.]
1. To utter the cry of the horse; to whinny. [1913 Webster]
2. To scoff or sneer; to jeer. [Obs.] [1913 Webster]
Neighed at his nakedness. --Beau. & Fl. [1913 Webster]

From: GCIDE