HAIKU Meaning of HAIKU in English [ 'hʌɪku: ]■ noun ( plural same or ~s ) a Japanese poem of seventeen syllables, in three lines of five, seven, and five.OriginJapanese, contr. of haikai no ku 'light verse'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004