Transom

[Sarah]

A horizontal crossbar in a window, over a door, or between adoor and a window above it. Transom is the horizontal, as mullion isthe vertical, bar across an opening. See Illust. of Mullion.

[Sarah]

A man who stops at nothing to impress.
And drinks harsh chemicals to get on a high.

[Jason Yan]

The flat surface forming the stern of a boat.

[Jessica]

Transom in Yachting. The name of the flat board forming the stern of a yacht.