- with certainty; without doubt; assuredly: I'll certainly be there.
- yes, of course: Certainly, take the keys.
- surely; to be sure: He certainly is successful.
Origin of certainly
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for certainly
Certainly, she seems to command near-total devotion among her clients.How Taryn Toomey’s ‘The Class’ Became New York’s Latest Fitness Craze
January 9, 2015
The well, ghost or no ghost, is certainly a piece of history with a bold presence.New York’s Most Tragic Ghost Loves Minimalist Swedish Fashion
January 8, 2015
They will do it,” Revels declared, “as certainly as the sun shines in the heavens.The Black Man Who Replaced Jefferson Davis in the Senate
January 7, 2015
Certainly paid paternity leave is part of it (and in the U.S., we need paid maternity and paternity leave).How Good Dads Can Change the World
Gary Barker, PhD, Michael Kaufman
January 6, 2015
I am fortunate that I have never been deathly ill, but whenever I have the stomach flu, I most certainly feel like I am dying.Why My Norovirus Panic Makes Me Sick
January 5, 2015
She certainly knew he was liable to go at any time, in exactly the way he did go.
I certainly did need you to come along right now and set me straight.
Too bad, though—you certainly need a wife to take the conceit out of you.
"Certainly, Robert," was the reply, but the lawyer's manner showed some surprise.Brave and Bold
"You certainly do know your business, son," said Uncle Peter, fervently.
- with certainty; without doubthe certainly rides very well
- by all means; definitely: used in answer to questions
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for certainly
Online Etymology Dictionary, © 2010 Douglas Harper