a method of thinking or acting which is not effective because it does not produce any results.

The latest evolutionary theory may turn out to be a blind alley.

• at the very least
• at this stage of the game
• at times
• attribute something to
• attribute something to someone
• attribute something to something
• attribute to
• attribute to someone
• attribute to something
• a turf war
• a turkey shoot
• a turn of phrase
• a turn of the knife
• a turn of the screw
• at variance with
• at variance with someone
• at variance with something
• a twist of the knife
• at wit's end
• at worst
• a two-way street
• at your best
• at your convenience
• at your earliest convenience
• at your expense