challenge

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.

"It gives us a new way to date fossil sites where volcanic layers are missing, a challenge that has limited paleontology for decades."

From Science Daily

Many of the studies included were cross-sectional, methods and populations varied widely, and accurately measuring children's dietary intake remains challenging.

From Science Daily

The challenge is that superconductivity usually occurs only at very low temperatures, far below everyday conditions.

From Science Daily

But it’s also a challenge to all other Latino communities: if folks from Wilmington to Hermosa Beach to Compton can cover their sports history so thoroughly, why can’t the rest of us?

From Los Angeles Times

Sixes, the cricket-themed social chain backed by England captain Ben Stokes, has gone into administration following a "challenging trading period".

From BBC