noun. Definition of blunder (Entry 2 of 2) : a gross error or mistake resulting usually from stupidity, ignorance, or carelessness a costly tactical blunder.

Is blunder a mistake?

A blunder can be subtle as well, but if opponent finds best move, u will lose immediately. A mistake won't lose immediately, but will put u at a big disadvantage. A mistakes is any kind of suboptimal move.

What is an example of a blunder?

Blunder means to say or do something in a careless or stupid way. An example of blunder is someone tripping over their own foot. To make a mistake in; botch. Would-be thieves blundering a break-in.