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Definitions

hypersonic

[hahy-per-son-ik] / ˌhaɪ pərˈsɒn ɪk /
ADJECTIVE
fast
Synonyms
STRONGEST
agile brisk hot nimble quick rapid swift
STRONG
accelerated active dashing electric flashing fleet fleeting flying hurried racing ready snap split-second winged
WEAK
PDQ blue streak breakneck double-time expeditious expeditive hairtrigger hasty in a jiffy in nothing flat lickety split like a bat out of hell like all get out like crazy like mad on the double posthaste presto pronto screamin' snappy speedball supersonic velocious
Antonyms
STRONGEST
clumsy slow
STRONG
dull
WEAK
plodding tardy unhurried

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.

President Donald Trump last year ordered his administration to develop a plan for a space-based shield capable of intercepting ballistic, cruise and hypersonic missiles, which he dubbed the “Golden Dome.”

From MarketWatch • Mar. 25, 2026

Applications include hypersonic missiles, advanced chip manufacturing, military ships and batteries for energy storage.

From The Wall Street Journal • Feb. 16, 2026

Moscow has also developed what it calls “novel” nuclear delivery systems, including an ICBM-mounted hypersonic glide vehicle, a nuclear-powered cruise missile, and a nuclear-capable autonomous underwater system.

From The Wall Street Journal • Feb. 15, 2026

Last month, the company was awarded an $805-million military contract, its largest to date, to build satellites for a network being developed for communications and detection of new threats, such as hypersonic missles.

From Los Angeles Times • Jan. 10, 2026

The most visionary of the brain busters pined for the day when a pilot could take one of their creations for a hypersonic joy ride: Mach 5 or faster.

From "Hidden Figures" by Margot Lee Shetterly

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.