Also found in: Thesaurus, Idioms.
n. & v.
Variant of vroom.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. the roaring sound made by a motor at high speed.v.i.
2. to make or move with such a sound.v.t.
3. to cause to make such a sound.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.