I. ˈhedə(r) noun
( -s )
Etymology: Middle English heder, from hed head + -er
1. obsolete : headsman
2. : a worker or machine that removes heads ; especially : a grain-harvesting machine that cuts off the grain heads and elevates them to a wagon
3.
a. : a brick or stone laid in a wall with its end toward the face of the wall — opposed to stretcher
b. : a beam fitted between trimmers and across the ends of tail beams in a building frame
c. : a conduit or chamber (as the exhaust manifold of a multicylinder engine) into which a number of smaller conduits open
d. : a wall or barrier at either end of a motor truck or trailer body to prevent shifting of cargo on stopping or starting
4.
a. : a worker or a machine that upsets rivets
b. : a cooper who puts heads on barrels by hand or by machine — called also headerman
5. : an officer in charge of a whaleboat
6. : a fall or dive head foremost
tripped and took a header into a rosebush
try a header off the high diving board
7. : a dog trained to head cattle or sheep
8. : a main shoot (as of a fruit tree) that tends to elongate with few side branches
9. : saddle 12
II. noun
1. : a mounting plate through which electrical terminals pass from a sealed device (as a transistor)
2. : a shot or pass in soccer made by heading the ball
3. : head 17a(1)