Blue | Mean of blue in English Dictionary

/ˈbluː/

• having the color of the clear sky
1. a blue house/car/shirt/pen
2. his bright blue eyes
3. the deep blue ocean
• sad or unhappy
1. Are you feeling blue?
• blue from being exposed to cold for too long
1. Her hands and feet are blue with cold.
2. He was shivering and blue from the cold.

• to turn blue from being cold or not breathing
1. The baby stopped breathing and went blue.
• to talk rapidly and without stopping
1. Sheesh! Your friend really talks a blue streak!
• Noun
• the color of the clear sky
1. Her favorite color is blue.
2. shades of blue
3. He was dressed in blue. [=blue clothing]
4. The sky was overcast, but here and there I could see a patch of blue. [=blue sky]
5. a mixture of blues and greens
• the sky or the sea
1. They sailed off into the blue.
• without warning
1. Then, out of the blue, he sold his house and left the country.