Definition of girder
: a horizontal main structural member (as in a building or bridge) that supports vertical loads and that consists of a single piece or of more than one piece bound together
Origin and Etymology of girder
First Known Use: 1611
GIRDER Defined for English Language Learners
Definition of girder for English Language Learners
: a strong beam used to build buildings, bridges, etc.
GIRDER Defined for Kids
Definition of girder for Students
: a horizontal main supporting beam <a girder of a bridge>
Seen and Heard
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