Heb. mashkoph, a projecting cover ( Exodus 12:22Exodus 12:23 ; ver. 7, "upper door post," but RSV "lintel"); the head-piece of a door, which the Israelites were commanded to mark with the blood of the paschal lamb.
These dictionary topics are from M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition, published by Thomas Nelson, 1897. Public Domain, copy freely.
[S] indicates this entry was also found in Smith's Bible Dictionary Bibliography InformationEaston, Matthew George. "Entry for Lintel". "Easton's Bible Dictionary". .