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

  • n. See focus.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A focus; a point at which rays of light or other radiation converge.
  • n. The centre of any activity.
  • n. A feature that attracts particular attention.

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

  • n. a point of convergence of light (or other radiation) or a point from which it diverges
  • n. the concentration of attention or energy on something
  • n. a central point or locus of an infection in an organism


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