Word.ws English Dictionary

subsonic

subsonic adjective: having a frequency too low to be audible.

Adjective

subsonic (not comparable)

  1. having a frequency too low to be audible
  2. (literary) very quiet, almost inaudible
    • The noise of the ship was all around her. The faint subsonic rumble of the reactor and drive. (Leviathan Wakes, James S. A. Corey)
  3. (aviation) less than the speed of sound (in the same medium, and at the same temperature and pressure)
    • But British Airways Flight 112 made the trek in under five hours, setting a new record for the fastest subsonic commercial flight across the Atlantic Ocean.2020 February 9, Alina Selyukh, “British Airways Sets Record, Crossing The Atlantic In Under 5 Hours In Strong Winds”, in NPR
  4. (fluid mechanics) with a Mach number such that 0.3 < Ma < 0.8 (approximately - the exact limits vary between sources)

Noun

subsonic (plural subsonics)

  1. an aircraft whose maximum speed is less than the speed of sound

subsonic meaning in Bengali and Tagalog

subsonic in Bengali

শব্দের গতির চেয়ে ধীর

subsonic in Tagalog

(of a speed) less than the speed of sound
kubnugin

Forms of subsonic

pluralsubsonics

Origin of subsonic

From sub- + sonic.

Words formed from subsonic

Words that rhyme with subsonic

48 more rhymesFewer rhymes

Questions about subsonic

What does subsonic mean?
Subsonic means having a frequency too low to be audible.
What is subsonic in Bengali?
Subsonic in Bengali is শব্দের গতির চেয়ে ধীর. See Subsonic meaning in Bengali.
What part of speech is subsonic?
Subsonic can be an adjective or a noun.

Words near subsonic in the dictionary

  1. subsolidus
  2. subsolution
  3. subsolutions
  4. subsong
  5. subsongs
  6. subsonic
  7. subsonically
  8. subsonication
  9. subsonications
  10. subsonics
  11. subsort

Source and license

Adapted from Wiktionary: subsonic (page history and authors); subsonic (Bengali Wiktionary) (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Vealhurl-subsonic.wav.

Cite this entry: “subsonic.” Word.ws, https://word.ws/subsonic. Based on Wiktionary, CC BY-SA 4.0.