verb (used with object), de·cel·er·at·ed, de·cel·er·at·ing.
verb (used without object), de·cel·er·at·ed, de·cel·er·at·ing.
Examples from the Web for decelerate
But by the early 1980s, Gallant's fast-paced life began to decelerate.
Arcot accelerated toward the planet for two hours, then began to decelerate.Islands of Space|John W Campbell
If anything of the right size shows up, decelerate until we can get mass and albedo measurements.Rip Foster in Ride the Gray Planet|Harold Leland Goodwin
They could decelerate it at a rate of fifteen gravities or more.Space Tug|Murray Leinster
British Dictionary definitions for decelerate
Word Origin for decelerate
Word Origin and History for decelerate
1899, back-formation from deceleration. Related: Decelerated; decelerating.