home Stefano Marchionini half [haf, hafh] –noun 1. one of two equal or approximately equal parts of a divisible whole, as an object, or unit of measure or time; a part of a whole equal or almost equal to the remainder. 2. a quantity or amount equal to such a part ( 1/2 ). –adjective 3. being one of two equal or approximately equal parts of a divisible whole: a half quart. 4. being half or about half of anything in degree, amount, length, etc.: at half speed; half sleeve. h a b c d e f g h i j k l m n o p q r s t u v w x y z hair hand half heart hang hang-time heaven herculean helicopter hickey hide-and-seek hig-hz hair-dryer