half (Adjective) — Consisting of one of two equivalent parts in value or quantity. ex. "a half chicken" ex. "lasted a half hour"
half (Adjective) — Partial. ex. "gave me a half smile" ex. "he did only a half job"
half (Adjective) — (of siblings) related through one parent only. ex. "a half brother" ex. "half sister"
half (Noun) — One of two equal parts of a divisible whole. ex. "half an hour" ex. "a century and one half" ex. "half a loaf"
half (Noun) — One of two divisions into which some games or performances are divided: the two divisions are separated by an interval.
half (Adverb) — Partially or to the extent of a half. ex. "he was half hidden by the bushes"