GRE decelerate Definition To reduce speed; to slow down. Example "The driver began to decelerate as the traffic light turned yellow." Sign in to save GRE PDF — $25 ← deceive decent → Related words GRE awe GRE smithereens GRE abacus SAT abase GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate SAT abdomen GRE abduct GRE aberrant