'Rambutan' definitions:

Definition of 'rambutan'

noun

Malayan tree bearing spiny red fruit [syn: rambutan, rambotan, rambutan tree, Nephelium lappaceum]

noun

Pleasantly acid bright red oval Malayan fruit covered with soft spines [syn: rambutan, rambotan]

From: GCIDE

Rambutan \Ram*bu"tan\ (r[a^]m*b[=oo]"t[a^]n), n. [Malay ramb[=u]tan, fr. rambut hair of the head.] (Bot.) A Malayan fruit produced by the tree Nephelium lappaceum, and closely related to the litchi nut. It is bright red, oval in shape, covered with coarse hairs (whence the name), and contains a pleasant acid pulp. Called also ramboostan. [1913 Webster]