What does the word useful mean?

Usage examples for useful

  1. On the other hand, it is useful to know your situation. – The Online World by Odd de Presno
  2. Hugh would have walked home that she might have more room, but he knew he could be useful when they arrived. – David Elginbrod by George MacDonald
  3. The peasant stood up, went to the great man, and asked what he wanted, and in what way he could be useful to him? – Household Tales by Brothers Grimm by Grimm Brothers