What is the meaning of a red state and a blue state?

Answer 1

A Red state traditionally supports the 2nd amendment and the suppression of equal rights. Blue states traditionally support gun and promotion of equal rights.

Answer 2

In America a "red state" is a state that traditionally supports the Republican Party

While a "blue state" is a state that traditionally supports the Deomcratic Party.

When applied to other countries, Red often stands for communism or can be in correspondense to local politics, etc.