half half /ˈhæf/

adjective

1. () Consisting of one of two equivalent parts in value or quantity  ( half )
   consisting of one of two equivalent parts in value or quantity
    A half chicken
   a half chicken
    Lasted a half hour
   lasted a half hour
   
2. () Partial  ( half )
   partial
    Gave me a half smile
   gave me a half smile
    He did only a half job
   he did only a half job
   
3. (of siblings) related through one parent only  ( half )
   (of siblings) related through one parent only
    A half brother
   a half brother
    Half sister
   half sister
   

adverb

1. () Partially or to the extent of a half  ( half )
   partially or to the extent of a half
    He was half hidden by the bushes
   he was half hidden by the bushes
   

noun

1. () One of two equal parts of a divisible whole  ( one-half , half )
   one of two equal parts of a divisible whole
    Half a loaf
   half a loaf
    Half an hour
   half an hour
    A century and one half
   a century and one half
   
2. One of two divisions into which some games or performances are divided: the two divisions are separated by an interval  ( half )
   one of two divisions into which some games or performances are divided: the two divisions are separated by an interval