monarch butterfly(n = noun.animal) danaus plexippus, milkweed butterfly, monarch - large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed;
is a kind of danaid, danaid butterfly
is a member of danaus, genus danaus

   A very large red and black butterfly (Danais Plexippus) having striking orange-brown wings with black veins in a reticulated pattern; -- called also milkweed butterfly and monarch. Its larvae feed on the leaves of the milkweed. [1913 Webster]

brush-footed butterfly, butterfly, butterfly bush, butterfly collector, butterfly effect, butterfly fish, butterfly flower, butterfly nut, butterfly orchid, butterfly orchis, butterfly pea, butterfly plant, butterfly ray, butterfly stroke, butterfly valve, butterfly weed, cabbage butterfly, comma butterfly, danaid butterfly, emperor butterfly, female monarch, four-footed butterfly, greater butterfly orchid, hairstreak butterfly, lesser butterfly orchid, lycaenid butterfly, male monarch, milkweed butterfly, monarch, mourning cloak butterfly, nymphalid butterfly, peacock butterfly, pierid butterfly, ringlet butterfly, sea butterfly, southern cabbage butterfly, sulfur butterfly, sulphur butterfly, tortoiseshell butterfly, troilus butterfly