proper time

  1. time measured by a clock that has the same motion as the observer. Any clock in motion relative to the observer, or in a different gravitational field, will not, according to the theory of relativity, measure proper time

Words Nearby proper time

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

How to use proper time in a sentence

  • This is the principal difficulty, and everything depends upon its continuance for the proper time.

  • The other two detectives were to wait in boats for the man who should be left in the yacht, and arrest him at the proper time.

    The Rival Campers | Ruel Perley Smith
  • At this time a little boy had not come home at the proper time, and the mother came to our house lamenting.

    East Anglia | J. Ewing Ritchie
  • Much depends on the progress towards maturity, and the supply of food in selecting the proper time for breeding.

    Domestic Animals | Richard L. Allen
  • But the leader had selected his party well, and not a sound was made till the proper time came.