Definitions

1. adjective

Lacking a girder or girders.

“The architect noted that the bridge would be girderless, relying on its curved design for support.”

2. adjective

Not requiring a girder or girders.

“The engineer said that the new design would result in a girderless construction method.”

3. adverb

In a way that is girderless.

“The bridge was designed to span the river girderless.”