[fawr-kast, -kahst, fohr-]
verb (used with object), fore·cast or fore·cast·ed, fore·cast·ing.
  1. to predict (a future condition or occurrence); calculate in advance: to forecast a heavy snowfall; to forecast lower interest rates.
  2. to serve as a prediction of; foreshadow.
  3. to contrive or plan beforehand; prearrange.
verb (used without object), fore·cast or fore·cast·ed, fore·cast·ing.
  1. to conjecture beforehand; make a prediction.
  2. to plan or arrange beforehand.
  1. a prediction, especially as to the weather.
  2. a conjecture as to something in the future.
  3. the act, practice, or faculty of forecasting.
  4. Archaic. foresight in planning.

Origin of forecast

1350–1400; Middle English (noun) plan. See fore-, cast
Related formsfore·cast·a·ble, adjectivefore·cast·er, nounre·fore·cast, verb (used with object), re·fore·cast or re·fore·cast·ed, re·fore·cast·ing.un·fore·cast, adjectiveun·fore·cast·ed, adjective

Synonyms for forecast

Synonym study

1. See predict. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for unforecast


verb -casts, -casting, -cast or -casted
  1. to predict or calculate (weather, events, etc), in advance
  2. (tr) to serve as an early indication of
  3. (tr) to plan in advance
  1. a statement of probable future weather conditions calculated from meteorological data
  2. a prophecy or prediction
  3. the practice or power of forecasting
Derived Formsforecaster, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for unforecast



late 14c., "to scheme," from fore- "before" + casten "contrive." Meaning "predict events" first attested late 15c. Related: Forecasted; forecasting.



early 15c., probably from forecast (v.); earliest sense was "forethought, prudence;" meaning "conjectured estimate of a future course" is from 1670s. A Middle English word for weather forecasting was aeromancy.

Online Etymology Dictionary, © 2010 Douglas Harper