- a large beam, esp one made of steel, used in the construction of bridges, buildings, etc
WordReference Random House Learner's Dictionary of American English © 2026
gird•er /ˈgɜrdɚ/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- Building, Civil Engineeringa large beam, as of steel, reinforced concrete, or timber, used for supporting buildings, structures, etc.
gird•er
(gûr′dər),USA pronunciation n.
gird′er•less, adj.
- Building, Civil Engineeringa large beam, as of steel, reinforced concrete, or timber, for supporting masonry, joists, purlins, etc.
- Building, Civil Engineeringa principal beam of wood, steel, etc., supporting the ends of joists.
- gird1 + -er1 1605–15
Collins Concise English Dictionary © HarperCollins Publishers::
girder /ˈɡɜːdə/ n
'girder' also found in these entries (note: many are not synonyms or translations):
box girder
- cantilever
- I-beam
- batten plate
- binder
- box beam
- corbel
- flitch beam
- hull girder
- lacing
- lattice girder
- latticing
- open-web
- panel
- plate girder
- template
- shelf angle
- shoe
- skeleton car
- stringer
- summer