keystone

1 ENTRIES FOUND:
Save
keystone /ˈkiːˌstoʊn/ noun
plural keystones
keystone
/ˈkiːˌstoʊn/
noun
plural keystones
Learner's definition of KEYSTONE
[count]
: a large stone at the top of an arch that locks the other stones in place
: something on which other things depend for support
Comments & Questions
Comments & Questions
What made you want to look up keystone? Include any comments and questions you have about this word.