GRE Word of the day : Sonic

Definition : of sound or its speed in air; CF. subsonic, supersonic

adj.
1. Of or relating to audible sound: a sonic wave.
2. Having a speed approaching or being that of sound in air, about 1,220 kilometers (760 miles) per hour at sea level.
3. Slang Extremely exciting and fast-paced: a sonic lifestyle.

Tags: audible sound, cf, definition of sound, gre, kilometers, level 3, lifestyle, miles per hour, sea level, slang, sonic, sonic antonym, sonic meaning, sonic synonym, sonic wave