the turn of the century

:  to cause to move around an axis or a center :  make rotate or revolve

:  to cause to move around so as to effect a desired end (as of locking, opening, or shutting)

:  to affect or alter the functioning of (something, such as a mechanical device) or the level of (something, such as sound) by such movement

:  the action or an act of turning about a center or axis :  revolution, rotation

:  any of various rotating or pivoting movements in dancing or gymnastics

:  the action or an act of giving or taking a different direction :  change of course or posture : such as

:  a subdivision of the Roman legion

:  a group, sequence, or series of 100 like things

:  a period of 100 years especially of the Christian era or of the preceding period of human history