Fermata
Definition 1: Watch the conductor.

Definition 2: Seriously, watch the conductor.

Definition 3: Please, for the sake of good old grandmother Margie who's had 5 heart attacks and 7 strokes yet still pushing through to the ripe old age of 972, watch the gosh darn director.
The music sheet showed the Fermata symbol, so I watched the conductor to see when I should stop!