Main entry: half
Definition: (of siblings) related through one parent only
Usage: a half brother; half sister
Antonyms: whole
Definition: (of siblings) having the same parents
Main entry: half
Definition: consisting of one of two equivalent parts in value or quantity
Usage: a half chicken; lasted a half hour
Antonyms: whole
Definition: including all components without exception; being one unit or constituting the full amount or extent or duration; complete
Main entry: half
Definition: partial
Usage: gave me a half smile; he did only a half job
Antonyms: complete
Definition: having every necessary or normal part or component or step