cornerstone
Cornerstone (noun) means a stone set at the base corner of a building, sometimes laid ceremonially with an inscription. Example: “The mayor laid the cornerstone of the new library in 1925.”
How to use cornerstone
Learner’s notesIn plain EnglishA foundation stone of a building, or figuratively the essential basis of something.
Word forms
- Plural
- cornerstones
Fill the gap
Can you complete this real example?
The mayor laid the _____ of the new library in 1925.
Etymology
From Middle English "corner ston"; the figurative sense echoes a well-known biblical image found in Psalms and repeated in the New Testament.