Definitions of half:

• noun:   in various games or performances: either of two periods of play separated by an interval
• noun:   one of two equal parts of a divisible whole

  Example: "Half a loaf"

• adjective:   (of siblings) related through one parent only

  Example: "A half brother"

• adverb:   partially or to the extent of a half

  Example: "He was half hidden by the bushes"

• name:  A surname (very rare: popularity rank in the U.S.: #51486)