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AST

1 American  
Or A.S.T.,
  1. Atlantic Standard Time. standard time


-ast 2 American  
  1. a suffix of nouns that denote a person who practices or is concerned with something, or holds certain principles, doctrines, etc.: ecdysiast;

    enthusiast;

    ecdysiast;

    gymnast.


AST British  

abbreviation

  1. Atlantic Standard Time

  2. automated screen trading (in securities)

  3. education advanced skills teacher

"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 -ast

A variant of -ist ( def. ) after the vowel i ; from Greek -astēs

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.

Satellite maker Sidus Space gained nearly 19% and shares of AST SpaceMobile rose by 10%.

From BBC • Mar. 25, 2026

AST SpaceMobile’s army of fervent retail trader fans will be hoping that by then, their own company’s satellites are already tracing their own celestial path.

From Barron's • Mar. 4, 2026

AST SpaceMobile aims for commercial service this year with 45 to 60 satellites, while SpaceX plans launches in mid-2027.

From Barron's • Mar. 4, 2026

AST SpaceMobile is racing to get enough satellites into space in order to deliver 5G-quality voice, data, and video coverage to cellphones anywhere in the world.

From Barron's • Mar. 4, 2026

His other computer, an AST 386SX with 330 MB of storage was the one his recruits called with reports.

From Terminal Compromise: computer terrorism: when privacy and freedom are the victims: a novel by Schwartau, Winn