Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “open”

open

noun [S]     /ˈəʊpən/
STOCK MARKET the time when a stock market begins trading: Bonds rose at the open after a cut in German interest rates. Stocks fell heavily at the open of trading today.
(Definition of open noun from the Cambridge Business English Dictionary © Cambridge University Press)
Focus on the pronunciation of open

Browse related topics

You are looking at an entry to do with Enclosing, surrounding and immersing, but you might be interested in these topics from the Including and excluding topic area:

Definitions of “open” in other dictionaries

Word of the Day

neighbourly

friendly or helpful

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More