What is the meaning of ?

blue

  1. one of three primary colors
  2. a shade of blue to blue green

one of three primary colors

a shade of blue to blue green

green

Short for 青信号 (aoshingō): green light (traffic light color, as the color of plants)

the black, bluish color of a horse's hair; also, such a horse

Short for 青短 (aotan): one of the three hanafuda cards bearing a blue 短冊 (tanzaku, narrow card used for poetry); a (yaku) of the three aotan cards, worth 3 points

a blue card in 天正カルタ (Tenshō karuta)

Short for 青本 (aohon, a blue-green covered book containing summaries of plays, histories, and legends).

Short for 青銭 (aosen, a 4 mon coin in circulation from 1768).

unripe, young

a female given name

a surname

the color blue

a female given name

a surname

a beast that looks like a weasel, and is said to have lived in present-day Fukuoka and Yamaguchi prefectures

a beast that looks like a wolf, and is said to have appeared around Mount Yoshino

Source: wiktionary.org