Definitions

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

  • adj. Possible to observe: observable phenomena; an observable change in demeanor. See Synonyms at noticeable.
  • adj. Deserving or worthy of note; noteworthy: an observable anniversary.
  • n. A physical property, such as weight or temperature, that can be observed or measured directly, as distinguished from a quantity, such as work or entropy, that must be derived from observed quantities.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Able to be observed.
  • adj. Deserving to be observed.
  • n. Any physical property that can be observed and measured directly and not derived from other properties

from the GNU version of the Collaborative International Dictionary of English

  • adj. Capable of being observed; discernible; noticeable.
  • adj. Worthy of being observed; important enough to be noted or celebrated.
  • adj. Noteworthy; remarkable.

from The Century Dictionary and Cyclopedia

  • Capable of being observed or noticed, or viewed with interest or attention.
  • Noticeable; worthy of observation; noteworthy; hence, remarkable.
  • That may or must be observed, followed, or kept: as, the formalities observable at court.
  • n. A noticeable or noteworthy fact or thing; something worth observing.

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

  • adj. capable of being seen or noticed

Etymologies

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