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English definition of “half”

half

adjective, adverb [not gradable]    /hæf/
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 adjective, adverb from the Cambridge Academic Content Dictionary © Cambridge University Press)
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