1. An advisory notice; a call to pay attention to or look at something
   "thanks for the heads up about the new edition";
   - heads-up

1. Fully alert and watchful
   "played heads-up ball";
   - wide-awake

1. A warning message
   "he sent a heads-up to the District Attorney"

Derived forms: heads-ups

See also: alert, watchful

Type of: warning

Encyclopedia: Heads up, 7 up