byembye adverb 1noun 1 adverb1 •(dialect, old-fashioned) by and by"Then this ain't no place for you," remarked Private Piggott. "They'll be 'aving a shot at us byembye, then you'll catch it again. What d'yer come 'ere for?" — 1918 noun1 •(dialect, old-fashioned) by and by