open day

British

noun

Also called: at-home. US and Canadian name: open house. an occasion on which an institution, such as a school, is open for inspection by the public

"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

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open day

"The biggest factor was the open day," she says, "and going to the school and listening to the head teacher talk about his vision."

From BBC ● Nov. 11, 2025

Runnymede St Edwards Primary School in West Derby has been using AI for three years and hosted an open day for other schools.

From BBC ● Oct. 9, 2024

The mosque in Hull’s Pearson Park has had a community open day for several years.

From BBC ● Oct. 3, 2024

Luisa never envisioned having a career in geology until fifth year at school when she attended an open day at the University of Glasgow.

From BBC ● Aug. 18, 2024

These programs open windows on a computer screen that stay open day and night.

From "Geeks: How Two Lost Boys Rode the Internet Out of Idaho" by Jon Katz

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023