plural -s

Definition of all-in-one

2 : a machine that is able to perform the functions usually performed by two or more separate machines (such as a printer and a scanner) all-in-ones are often priced on par with or below single-function printers, and consumers feel they're getting more for their money.— Jefferson Graham, USA Today, 19 Dec. 2007

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of all-in-one

1926, in the meaning defined at sense 1

Buying Guide

Our Reviews team has selected the best all-in-one computers.

Learn More About all-in-one

Time Traveler for all-in-one

Time Traveler

The first known use of all-in-one was in 1926

See more words from the same year

Dictionary Entries Near all-in-one

(all) in good time


all in one's head

See More Nearby Entries 

Statistics for all-in-one

Cite this Entry

“All-in-one.” Dictionary, Merriam-Webster, Accessed 30 Jun. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

Which Word Does Not Belong?

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!