subsonic

play
adjective sub·son·ic \ˌsəb-ˈsä-nik\

Definition of subsonic

  1. 1 :  of, relating to, or being a speed less than that of sound in air

  2. 2 :  moving, capable of moving, or utilizing air currents moving at a subsonic speed

  3. 3 :  infrasonic 1

subsonically

play \-ni-k(ə-)lē\ adverb

Recent Examples of subsonic from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'subsonic'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of subsonic

International Scientific Vocabulary


SUBSONIC Defined for English Language Learners

subsonic

play
adjective

Definition of subsonic for English Language Learners

  • : slower than the speed of sound

Learn More about subsonic


Seen and Heard

What made you want to look up subsonic? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

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

WORD OF THE DAY

to counsel, recommend, or inform

Get Word of the Day daily email!

Test Your Vocabulary

The Emoji Quiz

  • emoji-the-quiz
  • What phase of the moon is this: 🌖 ?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

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