Definition of "heads-up" in English

Noun

1. A warning or call to pay attention; an advisory notice; a notice of what is to happen; a holler.

   • Send everyone a heads-up about the inspection tomorrow.

2. Involving two players. (usually said when there are only two players in the table; or, when all players except two folded)

   • There were only two of us, so we started playing heads-up.
   • There are seven players on the table. Five folded, the remaining two played heads-up until the showdown.

Adjective

1. With head directly above the neck, eyes front.

   • A heads-up posture meant the pilot couldn't pay attention to his instruments.

2. Alert; vigilant

   • Getting those marbles off the red carpet was a real heads-up move.