Definition of perpendicularnext

Synonym Chooser

How does the adjective perpendicular differ from other similar words?

The words plumb and vertical are common synonyms of perpendicular. While all three words mean "being at right angles to a base line," perpendicular may stress the straightness of a line making a right angle with any other line, not necessarily a horizontal one.

the parallel bars are perpendicular to the support posts

When is plumb a more appropriate choice than perpendicular?

While in some cases nearly identical to perpendicular, plumb stresses an exact verticality determined (as with a plumb line) by earth's gravity.

make sure that the wall is plumb

When is it sensible to use vertical instead of perpendicular?

While the synonyms vertical and perpendicular are close in meaning, vertical suggests a line or direction rising straight upward toward a zenith.

the side of the cliff is almost vertical

Example Sentences

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.
Recent Examples of perpendicular The vehicle is then seen being turned perpendicular and appearing to block the roadway. Louis Casiano, FOXNews.com, 9 Jan. 2026 The shower owes its brief peak to the near-perpendicular angle at which Earth smashes through the thin debris trail left by asteroid 2003 EH1. Anthony Wood, Space.com, 3 Jan. 2026 On the top, a lattice of faint lines ran parallel and perpendicular to the outer face. Alex Ross, New Yorker, 24 Nov. 2025 Rising from each track was a metal tower, and connecting those towers was another perpendicular track of sorts, with a machine sliding across its rails from side to side. Jake Goodrick, Sacbee.com, 8 Nov. 2025 See All Example Sentences for perpendicular
Recent Examples of Synonyms for perpendicular
Adjective
  • The company presented the AIR ONE, an all-electric vertical takeoff and landing (eVTOL) aircraft.
    Aamir Khollam, Interesting Engineering, 10 Jan. 2026
  • Space-savers will include pull-out vertical pantries that slide into narrow spaces, toe-kick drawers that utilize the area beneath your cabinets and corner carousel units that make those awkward spaces accessible.
    Lew Sichelman, Miami Herald, 9 Jan. 2026
Adjective
  • It’s been a strenuous 18-year fall from grace since Susan Sarandon handed the magnificent disaster his Golden Globe, his longtime buddy Bruce Springsteen mugging with glee as a standing ovation crowd cheered him on.
    Steve Garbarino, HollywoodReporter, 22 Jan. 2026
  • Under the cooler, standing water covered the floor.
    David J. Neal, Miami Herald, 22 Jan. 2026
Adjective
  • For total protection, erect metal or polypropylene deer fencing around the plant to prevent them from entering.
    Lee Wallender, The Spruce, 8 Jan. 2026
  • Thanks for that last shot of a fully erect Tommy.
    William Earl, Variety, 28 Dec. 2025

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Cite this Entry

“Perpendicular.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/perpendicular. Accessed 27 Jan. 2026.

More from Merriam-Webster on perpendicular

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