Noah Webster
Thorough
THOROUGH, adjective thur'ro.
1. Literally, passing through or to the end; hence, complete; perfect; as a thorough reformation; thorough work; a thorough translator; a thorough poet.
2. Passing through; as thorough lights in a house.
THOROUGH, preposition thur'ro. From side to side, or from end to end.
1. By means of. [Not now used.] [See Through.]
THOROUGH, noun thur'ro. An inter-furrow between two ridges.