Definition of: four-in-hand

(fôr′in·hand′, fōr′-) adjective
1. Consisting of a four–horse team driven by one person.
2. Designating a necktie tied in a slipknot with the ends hanging vertically.
—noun
1. A four–horse team driven by one person; also, a vehicle drawn by four horses.
2. A four–in–hand necktie.