Real Dictionary

forecast
countable noun: A forecast is a statement of what is expected to happen in the future, especially in relation to a particular event or situation.
verb: If you forecast future events, you say what you think is going to happen in the future.

forecast in American English
foresight; forethought
to foresee
to make a forecast
intransitive verb: to conjecture beforehand; make a prediction
noun: a prediction, esp. as to the weather
transitive verb: to predict (a future condition or occurrence); calculate in advance

forecast in British English
noun: a statement of probable future weather conditions calculated from meteorological data
verb: to predict or calculate (weather, events, etc), in advance

forecast in Finance
noun: A forecast is a prediction of future performance and financial position.