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A dull, hollow sound: the thunk of a metal pipe striking a tree.
intr.v. thunked, thunk·ing, thunks
To make a dull, hollow sound: "Her hard shoes thunk on the stairs" (Carolyn Chute).
A past tense and a past participle of think.
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.
informal another word for thud
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
1. an abrupt, dull sound.v.i.
2. to make such a sound.
Nonstandard. a pt. and pp. of think 1.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.