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Synonyms

superhighway

American  
[soo-per-hahy-wey, soo-per-hahy-wey] / ˈsu pərˌhaɪ weɪ, ˌsu pərˈhaɪˌweɪ /

noun

  1. a highway designed for travel at high speeds, having more than one lane for each direction of traffic, a safety strip dividing the two directions, and cloverleaves to route the traffic on and off the highway.

  2. any very fast route or course.

superhighway British  
/ ˈsuːpəˌhaɪweɪ /

noun

  1. a fast dual-carriageway road

"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

Etymology

Origin of superhighway

First recorded in 1925–30; super- + highway

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.

Running southwest is the Via Baltica superhighway to Poland, clogged with trucks from all over the EU and Ukraine.

From The Wall Street Journal • Feb. 5, 2026

It's the body's superhighway that carries information from your brain to your major organs.

From BBC • Nov. 8, 2025

Google instead wants to blitz you with buggy new gizmos whose basic functionalities lack everything that made Google an empire, a verb, a dependable custodian of the information superhighway.

From Slate • May 16, 2024

For nearly 15 years, the four daughters of “Real Housewives of Beverly Hills” star Kyle Richards have been passengers to their mother’s journey on the reality TV superhighway.

From Los Angeles Times • Mar. 26, 2024

It was the cover for a termite superhighway.

From "1491" by Charles C. Mann

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.