An Etymological Dictionary of Astronomy and Astrophysics

1. Knowledge gained through study, communication, research, instruction, etc.
   

2. Knowledge communicated or received concerning a particular fact or circumstance; news.
   

3. The act or fact of informing.
   

4. A sequence of signals that conveys a message to a receiver. Information does not exist on its own. It is contained within something and is coded. The notion of information involves → uncertainty and → randomness; hence the necessity for calling on → probability theory and → statistics.
   

See also:

→ information content, → information entropy, → information flow, → information paradox, → information science, → information technology, → information theory, → infosphere, → quantum information, → entropy.

See also: Verbal noun of → inform.