(pronounced just like the two words – red and line – put together)

In the banking, technology, and automotive worlds, this word has an array of meanings, but in the architecture and design industry it means only one thing: to mark up construction documents (specifications and drawings) for corrections and/or changes. Traditionally, this was done with a red pen so that it could be seen easily, but now, many firms redline on the computer in a variety of ways. Many designers, architects, and engineers will have CAD draftsmen or interns to assist them, so the latter will work on drawings and present them to the former, who will then redline the drawings so that accurate corrections can be made.