1
: being a mechanical linkage or equivalent device designed to produce or copy motion in a straight line
2
: having the principal parts arranged in a straight line
3
: marked by a uniform spread and especially in equal segments over a given term
straight-line amortization
straight-line depreciation
4
: occurring, measured, or made in or along a straight line
straight-line motion
straight-line extrapolation

Examples of straight-line in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Where spatial curvature is large, the deviations from straight-line paths are large, and the rate at which time passes can dilate significantly as well. Big Think, 24 Mar. 2026 The main threat during the storms is straight-line wind gusts in excess of 60 mph. Nick Lentz, CBS News, 16 Mar. 2026 The region at greatest risk for damaging straight-line winds of more than 75 mph and tornadoes was the mid-Atlantic, specifically from northern South Carolina to southern Maryland. Kathryn Prociv, NBC news, 16 Mar. 2026 Has straight-line speed that can be highlighted on special teams and plays sparingly on defense. David Furones, Sun Sentinel, 16 Mar. 2026 See All Example Sentences for straight-line

Word History

First Known Use

1772, in the meaning defined at sense 4

Time Traveler
The first known use of straight-line was in 1772

Browse Nearby Words

Cite this Entry

“Straight-line.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/straight-line. Accessed 6 Apr. 2026.

Legal Definition

straight-line

adjective
: marked by equal payments over a given term
using the straight-line method of depreciation
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster