head·er 
/ˈhɛdɚ/ noun
plural head·ers /ˈhɛdɚ/ noun [count] 1 : a word, phrase, etc., that is placed at the beginning of a document, passage, etc., or at the top of a page
▪ a column header ▪ an e-mail header [=lines at the beginning of an e-mail message giving information about the message's origin, etc.] — see picture at table; compare footer 2 informal : a fall in which your head hits the ground
▪ She tripped on the rock and took a header. 3 soccer : a shot or pass made by hitting the ball with your head
▪ He scored with a header past the goalie.
▪ a column header ▪ an e-mail header [=lines at the beginning of an e-mail message giving information about the message's origin, etc.] — see picture at table; compare footer
▪ She tripped on the rock and took a header.
▪ He scored with a header past the goalie.
— see also doubleheader
