Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Unsteady; unstable.
  • adj. Physics Having no particular directional characteristics.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Not static or stable; unsteady, unstable
  • adj. Of or pertaining to astasia

from the GNU version of the Collaborative International Dictionary of English

  • adj. Having little or no tendency to take a fixed or definite position or direction: thus, a suspended magnetic needle, when rendered astatic, loses its polarity, or tendency to point in a given direction.

from The Century Dictionary and Cyclopedia

  • Unstable; unsteady.
  • Hence In physical, having no tendency to take a definite (fixed) position; without directive power: used especially of a magnetic needle whose directive property has been neutralized.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. not static or stable

Etymologies

a- +‎ static (Wiktionary)

Examples

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