time machine

American

noun

a theoretical apparatus that would convey one to the past or future.

time machine British

noun

(in science fiction) a machine in which people or objects can be transported into the past or the future

"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

Other Word Forms

Noun Inflected Forms

time machines

plural

Etymology

Origin of time machine

First recorded in 1890–95

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

time machine

Gravy packets function as a sort of culinary time machine, contributing concentrated savory notes that would otherwise take much longer to build.

From Salon ● Jun. 2, 2026

One installation, triggered by flushing the toilet inside the Tardis, emits the sound of the fictional time machine taking off.

From BBC ● Apr. 14, 2026

Imagine what it would be like to step in a time machine and jump 50 years into the future.

From Barron's ● Mar. 31, 2026

Imagine a time machine, like Doc Brown’s DeLorean in “Back to the Future,” that could transport us to the best possible times in history to invest.

From The Wall Street Journal ● Feb. 13, 2026

A photograph is a kind of time machine.

From "Everything, Everything" by Nicola Yoon

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023