noun
One of two usually roughly equal parts into which anything may be divided, or considered as divided.
Half of a standard measure, chiefly:
(preceded by “a” or a number) The fraction obtained by dividing 1 by 2.
Any of the three terms at Eton College, for Michaelmas, Lent, and summer.
(slang) A half sibling.
(UK, dated) A child ticket. Two and a half to Paddington.
(sports) abbreviated form for half marathon.
(numismatic slang) Clipping of half-dollar.
adjective
Consisting of a half (½, 50%).
Consisting of some indefinite portion resembling a half; approximately a half, whether more or less; partial; imperfect.
(of a sibling) Having one parent (rather than two) in common.
(of a relative other than a sibling) Related through one common grandparent or ancestor rather than two.
adverb
In two equal parts or to an equal degree.
In some part approximating a half.
Partially; imperfectly.
Practically, nearly.
verb
(transitive, obsolete) To halve.
preposition
(UK, Ireland) Half past; a half-hour (30 minutes) after the last hour.
(rare, see usage notes) A half-hour to (preceding) the next hour.
interjection
(theater) A call reminding performers that the performance will begin in thirty minutes.