Origin: Germanic Old English prefix
Forecast has 6 different meanings across 2 categories:
An estimation of a future condition.
"The meteorologist gave an accurate forecast that heavy rain would begin by noon."
In plain English: A forecast is a prediction about what will happen in the future, like what the weather will be like tomorrow.
"The weather forecast predicts rain later today."
Usage: Use forecast as a noun to refer to a prediction or estimate of what will happen in the future, such as a weather report or economic projection. It is often interchangeable with prediction but specifically implies that the estimate is based on data and analysis.
To estimate how something will be in the future.
"The meteorologist warned that a severe storm was forecast for tomorrow evening."
In plain English: To forecast means to predict what will happen in the future based on current information.
"The weather forecast predicted rain for the afternoon, so we brought umbrellas."
Usage: Use forecast to predict future conditions based on current data or trends, such as weather patterns or economic shifts. Avoid using it for general guesses that lack an analytical basis.
Forecast comes from Middle English, where it was formed by combining the prefix fore- with cast to mean "to throw ahead." This term entered English as a verb describing the act of predicting future events based on current signs.