'Rubai' definitions:

Definition of 'Rubai'

From: GCIDE

Rubaiyat \Ru*bai*yat"\, n. pl.; sing. Rubai. [Ar. rub[=a]'iy[=a]h quatrian, pl. of rub[=a]'iy having four radicals, fr. rub[=a]' four.] Quatrians; as, the Rubaiyat of Omar Khayyam. Sometimes in pl. construed as sing., a poem in such stanzas. [Webster 1913 Suppl.]