The top tube of a bicycle frame.
The top of the goal structure.
Any transverse bar or piece, such as a bar across a door, or the iron bar or stock which passes through the shank of an anchor.
To mark with a pattern of transverse bars.
A temporary modular system of tubes (or formerly wood) forming a framework used to support people and material in the construction or repair of buildings and other large structures.
Source code etc. that is incomplete and serves as a basis for further development.
Any framework or support.