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English definition of “half”

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half

pronoun, noun [C/U]  /hæf/ ( plural halves  /hævz/) us  
either of the two equal or nearly equal parts that together make up a whole: [U] Half of 12 is 6. [U] Half (of) the students are Spanish. [U] Cut the apple in half (= into two equal parts). [C] The recipe calls for a pound and a half of potatoes. In sports, a half is one of two equal periods of play, often with a short pause for rest between them.

half

adjective, adverb [not gradable]  /hæf/ us  
referring to either of the two equal or nearly equal parts that together make up a whole: Each talk should last about a half hour/half an hour (= 30 minutes). We need half a dozen (= six) eggs. Half also means partly or not completely: She was still sleepy and only half aware of what was happening. I half expected (= almost expected) to see her at the party.
(Definition of half from the Cambridge Academic Content Dictionary © Cambridge University Press)
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