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• AST
  AST

  Atlantic Standard Time. standard time
• -ast
  -ast

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

AST

¹ American  

Or A.S.T.,

1. Atlantic Standard Time. standard time

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-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.

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AST British  

abbreviation

1. Atlantic Standard Time

2. automated screen trading (in securities)

3. education advanced skills teacher

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Etymology

Origin of -ast

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

Example Sentences

AST SpaceMobile gained 27% this week and Virgin Galactic jumped 15%, while shares of Rocket Lab rose 8.8%.

From The Wall Street Journal • May 23, 2026

SpaceX’s IPO news led to mixed trading, with Rocket Lab down 4.5% and AST SpaceMobile up 6.9% in midday trading.

From Barron's • May 21, 2026

SpaceX’s move toward a blockbuster IPO rippled throughout Wall Street—lifting space-focused companies like AST SpaceMobile and Virgin Galactic up more than 7%.

From The Wall Street Journal • May 21, 2026

AST SpaceMobile shares were up 2.1% in early trading, having earlier risen close to 5%.

From Barron's • May 14, 2026

This led to a thorough familiarity with the European PC distribution business, and he worked then as AST Research's first European sales manager.

From Interviews (1998-2001) by Lebert, Marie