Definition of grade separation
: a highway or railroad crossing using an underpass or overpass
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Moving up Queen Anne Hill, note the steep grade separation to the left of the transfer station at the corner of Aloha and Dexter.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'grade separation.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of grade separation
1935
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