Having a significant effect on the course of one's life.

plural of change purse

plural of regime change

Alternative form of Wuchang

(engineering) One of a set of wheels of different sizes and number of teeth, that may be changed or substituted for one another in machinery, to produce a different but definite rate of angular velocity in an axis, as in cutting screws, gear, etc.

(physics, chemistry) A change affecting the form of a chemical substance, but not its chemical composition.

plural of physical change

(automotive) the process of draining old oil from an engine or gearbox and refilling with fresh oil, often done at recommended intervals.

plural of oil change

(intransitive, baseball) To throw a pitch at a much slower than expected speed. / (intransitive) To confuse someone by doing something unexpected or in an unexpected way.