for sure

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Some historians have speculated that Thomas Jefferson showed up to supervise publication, though nobody knows for sure.

From The Wall Street Journal • Apr. 3, 2026

“Kontinental ’25” is about the heavy stuff, for sure.

From Los Angeles Times • Apr. 3, 2026

"We have only seen a few tidal disruption events of this type, so we don't know for sure how they're supposed to evolve," Sears said.

From Science Daily • Mar. 30, 2026

The "short answer is we don't know for sure" what actually led to the reduction in size of Rosie's biggest tumour, said Pall Thordarson, director of UNSW's RNA institute which created the vaccine.

From Barron's • Mar. 30, 2026

I thought for sure he’d go into hysterics, but instead he stopped crying and drifted off in Mard’s arms as she rocked him.

From "Rump: The (Fairly) True Story of Rumpelstilskin" by Liesl Shurtliff