cal /kæl/ noun7 •Calcium hydroxide (slaked lime). •(informal) a short written form of "calorie", used after a number on food packages •(informal) Clipping of caliber. •(informal) Clipping of calendar. •Clipping of calibration. •(Philippines) Clipping of calculator. •(dialect, no longer used) wolfram, an ore of tungsten. formscals · cals.