flat pea n 1: evergreen shrub having almost heart-shaped foliage and bright yellow pealike flowers followed by flat pods with flat wings; Australia and Tasmania [syn: {Platylobium formosum}] 2: European perennial with mottled purple-pink flowers; sometimes cultivated for fodder or as green manure [syn: {narrow-leaved everlasting pea}, {Lathyrus sylvestris}]