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online

or on-line, on line

[ on-lahyn, awn- ]
/ ˈɒnˈlaɪn, ˈɔn- /
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adjective
adverb
with or through a computer, especially over a network.
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Origin of online

First recorded in 1915–20 (in sense “located on rail lines”); 1945–50 for other senses
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use online in a sentence

British Dictionary definitions for online

online

on-line

/ (ˈɒnˌlaɪn) /

adjective
of, relating to, or concerned with a peripheral device that is directly connected to and controlled by the central processing unit of a computer
of or relating to the internetonline shopping
occurring as part of, or involving, a continuous sequence of operations, such as a production line
adverb
while connected to a computer or the internet
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for online

online
[ ŏnlīn ]

Connected to or accessible by means of a computer or computer network.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Cultural definitions for online

online

A term referring to locations on or use of the Internet. The term can be used to refer to a specific location or Web page (“Our sales catalogues can be found online at — ”) or to a personal activity (“I went online to find the information you wanted.”)

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Other Idioms and Phrases with online

on line

1

See in line, def. 2.

2

Actively linked to or operating a computer, as in They haven't got the printer on line yet, or Mark's been on line all morning. [Late 1900s] Also see go on, def. 9.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
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