a framing member crossing and supporting the ends of joists, studs, or rafters so as to transfer their weight to parallel joists, studs, or rafters(noun.artifact)
source: wordnet30
a machine that cuts the heads off grain and moves them into a wagon(noun.artifact)
source: wordnet30
(soccer) the act of hitting the ball with your head(noun.act)
source: wordnet30
a headlong jump (or fall)(noun.act)
Example: He took a header into the shrubbery.
source: wordnet30
One who, or that which, heads nails, rivets, etc., esp. a machine for heading.(noun)