What does the word tentative mean?

Usage examples for tentative

  1. He had never found the paper lost out of the closet in his own room, though he had never given up a tentative search for it. – A Woman Named Smith by Marie Conway Oemler
  2. He had been always tentative and diffident, deferential even so far as her own opinions were concerned. – Marcella by Mrs. Humphry Ward
  3. Part C consists of a few tentative rules advanced with the notion of fixing classification practice within the office in certain doubtful cases. – The Classification of Patents by United States Patent Office