What does it mean to feel blue?

Question

What does it mean to feel blue?

Answer 1

it means to feel sad

Answer 2

To feel sad/down

Answer 3

feel blue: feel sad and depressed.

    "I'm feeling blue because I haven't had any mail except bills for a long, long time."

http://www.eslcafe.com/idioms/id-f.html

Be depressed or sad, as in I was really feeling blue after she told me she was leaving. The use of blue to mean "sad" dates from the late 1300s.

http://www.answers.com/topic/feel-blue

Idioms: have the blues

Also, feel blue. Feel depressed or sad, as in After seeing the old house in such bad shape, I had the blues for weeks, or Patricia tends to feel blue around the holidays. The noun blues, meaning "low spirits," was first recorded in 1741 and may come from  blue devil, a 17th-century term for a baleful demon, or from the adjective  blue meaning "sad," a usage first recorded in Chaucer's Complaint of Mars  (c. 1385). The idiom may have been reinforced by the notion that anxiety produces a livid skin color. Also see  blue funk.

http://www.answers.com/topic/have-the-bl...

be down, be in a huff, be in the dumps, feel down, have the pips

Answer 4

Yeah...for some reason Blue is associated with feeling down or depressed....