What does the word superfluous mean?

Usage examples for superfluous

  1. This young man has left prints upon the stair- carpet which made it quite superfluous for me to ask to see those which he had made in the room. – Memoirs of Sherlock Holmes by Sir Arthur Conan Doyle
  2. These books are so well known that further comment seems superfluous. – The Busted Ex-Texan and Other Stories by W. H. H. Murray
  3. My investigations went no further; but, encouraged in my rescue work by spasmodic gestures on the part of the patient, and forbearance on the part of the dog, I removed several superfluous layers of wool. – The Motor Maid by Alice Muriel Williamson and Charles Norris Williamson