Definition of "Half" :

noun: one of two equal parts of a divisible whole

"Half a loaf."

noun: one of two divisions into which some games or performances are divided: the two divisions are separated by an interval

adjective: consisting of one of two equivalent parts in value or quantity

"A half chicken."

adjective: (of siblings) related through one parent only

"A half brother."

adjective: partial

"Gave me a half smile."

adverb: partially or to the extent of a half

"He was half hidden by the bushes."