Definitions

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

  • n. A minor tremor of the earth that precedes a larger earthquake originating at approximately the same location.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A small earth tremor which precedes the mainshock in an earthquake sequence. Not all mainshocks have foreshocks.

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

  • n. a tremor preceding an earthquake

Etymologies

fore- +‎ shock (Wiktionary)

Examples

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