header

head·er

noun

The definition of a header is a person or thing that puts tops on something, or is information at the top of pages in a paper, or is slang for a headfirst fall.

An example of a header is a tool that puts the tops on nails.
An example of a header is the title and page number on the top of the pages in a report.
An example of a header is falling headfirst down a ski slope.

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header

a person or device that puts heads on pins, nails, rivets, etc.
a machine that takes off the heads of grain and sends them up an inclined plane into a wagon
a pipe, tube, etc. that brings together other pipes to direct the flow of a fluid through them, as in an exhaust system
in word processing, a line or lines of text, typically consisting of the topic, date, page number, etc., printed at the top of each page of a document
Informal a headlong fall or dive
Carpentry a wooden beam, as in flooring, placed between two long beams with the ends of short beams resting against it
Masonry a brick or building stone laid across the thickness of a wall so that a short end is exposed in the face of the wall
Soccer a shot or pass made by hitting the ball with the head

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header

noun

One that fits a head on an object.
One that removes a head from an object, especially a machine that reaps the heads of grain and passes them into a wagon or receptacle.
A pipe that serves as a central connection for two or more smaller pipes.
A floor or roof beam placed between two long beams that supports the ends of the tailpieces.
A brick or stone laid at a right angle to the face of a wall so that only its short end is showing. Also called bonder .
Informal A headlong dive or fall.
Sports A pass or shot made in soccer by heading the ball.
Textual information, such as a title, date, or page number, positioned in the top margin of a page and usually repeated throughout a document.
A raised tank or hopper that maintains a constant pressure or supply to a system, especially the small tank that supplies water to a central heating system.

THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION by the Editors of the American Heritage Dictionaries. Copyright © 2016, 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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Noun

(plural headers)

The upper portion of a page (other) layout.
If you reduce the header of this document, the body will fit onto a single page.
Text, or other visual information, used to mark off a quantity of text, often titling or summarizing it.
Your header is too long; "Local Cannibals" will suffice.
Text, or other visual information, that goes at the top of a column of information in a table.
That column should have the header "payment status".
(informal) A font, text style, or typesetting used for any of the above.
Parts of speech belong in a level-three header. Level-two headers are reserved for the name of the language.
a brick that is laid sideways at the top of a wall or within the brickwork with the short side showing; compare stretcher
This wall has four header courses.
a horizontal structural or finish piece over an opening
a machine that cuts the heads off of grain etc
They fed the bale into the header.
(soccer) the act of hitting the ball with the head
His header for the goal followed a perfect corner kick.
a headlong fall or jump
The clown tripped over the other clown and took a header.
(computing) the first part of a file or record that describes its contents
The header includes an index, an identifier, and a pointer to the next entry.
(networking) the first part of a packet, often containing its address and descriptors
The encapsulation layer adds an eight-byte header and a two-byte trailer to each packet.
A raised tank that supplies water at constant pressure, especially to a central heating and hot water system

Anagrams

Origin

head + -er

English Wiktionary. Available under CC-BY-SA license.

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header - Computer Definition

The portion of a data block, cell, frame, or packet that precedes the text field or payload and provides information such as the source address and destination address. The header often includes synchronization bits that serve to synchronize the operations of the transmit and receive devices across the link. Certain data protocols also use fields in the header to identify the length of the text field and the type of data, to indicate the level of tolerance for delay or loss during network transit, and any optional headers that might follow. For example, an Internet Protocol (IP) header might indicate that a Transmission Control Protocol (TCP) header follows. See also block, cell, data format (illustration), frame, packet, payload, text field, and trailer.
The user header includes user-definable information such as system access (password), organization or department ID, operator ID, terminal ID, database or application ID, destination address, message sequence number, date/time ID, and message priority.

Webster's New World Telecom Dictionary Copyright © 2010 by Wiley Publishing, Inc., Indianapolis, Indiana.
Used by arrangement with John Wiley & Sons, Inc.

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(1) In a disk or tape file, a set of data that resides permanently at the beginning. It may be used for identification only (type of file, date of last update, etc.), or it may describe the structural layout of the contents, as is common with many document and database formats.

(2) In a document or report, common text printed at the top of every page.

(3) Any caption or description used as a headline.

(4) In communications and networking, a group of fields added to the beginning of the message or packet. The fields typically include source and destination addresses as well as data that describe the message content. See HTTP header, e-mail header and header file.

Network Headers Are Temporary

A stream of data is broken up into packets. Headers are added as the packets move down the protocol stack in the sending machine, only to be discarded at the receiving machine. The headers serve only to get the message body from one point to another. See protocol stack.

Computer Desktop Encyclopedia THIS DEFINITION IS FOR PERSONAL USE ONLY All other reproduction is strictly prohibited without permission from the publisher. © 1981-2017 The Computer Language Company Inc. All rights reserved.