1
: one that removes heads
especially
: a grain-harvesting machine that cuts off the grain heads and elevates them to a wagon
2
a
: a brick or stone laid in a wall with its end toward the face of the wall
b
: a beam fitted at one side of an opening to support free ends of floor joists, studs, or rafters
c
: a horizontal structural or finish piece over an opening : lintel
d
: a conduit (such as an exhaust pipe for a many-cylindered engine) into which a number of smaller conduits open
e
: a mounting plate through which electrical terminals pass from a sealed device (such as a transistor)
3
: a fall or dive headfirst
took a header into the pool
4
: a shot or pass in soccer made by heading the ball
5
b
: information (such as a page number) printed or placed at the top of each page of a document compare footer sense 2
Examples of header in a Sentence
She tripped on the rock and took a header.
He scored with a header past the goalie.
Recent Examples on the Web
Safari's address bar and header area are a hint more translucent than in Sequoia but considerably more opaque than the same aggressively light-bending glassy UI in iOS 26.
—
ArsTechnica, 15 Sep. 2025
Ninety-one minutes had elapsed when Michael Keane strained to meet Jack Grealish’s cross into the box and plant his header wide of goal.
—Patrick Boyland, New York Times, 15 Sep. 2025
Its 3-pin (5V) ARGB headers are protected by caps.
—PC Magazine, 14 Sep. 2025
Miller, a native of Versailles, Kentucky, will be especially busy at this year's festival performing a double header.
—Kirby Adams, Louisville Courier Journal, 8 Sep. 2025
See All Example Sentences for header
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ArsTechnica, 15 Sep. 2025
Ninety-one minutes had elapsed when Michael Keane strained to meet Jack Grealish’s cross into the box and plant his header wide of goal.
—Patrick Boyland, New York Times, 15 Sep. 2025
Its 3-pin (5V) ARGB headers are protected by caps.
—PC Magazine, 14 Sep. 2025
Miller, a native of Versailles, Kentucky, will be especially busy at this year's festival performing a double header.
—Kirby Adams, Louisville Courier Journal, 8 Sep. 2025
See All Example Sentences for header
Cite this Entry
“Header.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/header. Accessed 16 Sep. 2025.
Copy CitationKids Definition
header
noun
head·er
ˈhed-ər 
: a fall or dive headfirst
took a header downstairs
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