ad libitum

1 of 2

adverb

ad li·​bi·​tum (ˌ)ad-ˈli-bə-təm How to pronounce ad libitum (audio)
: ad lib
rats fed ad libitum

ad libitum

2 of 2

adjective

: omissible according to a performer's wishes
used as a direction in music
compare obbligato entry 1

Examples of ad libitum in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adverb
This risks skewing the results, since the difference in life span between the diet group and the ad libitum group may be down to poor overall health in the group allowed to gorge itself. William A. Haseltine, Forbes, 2 Mar. 2024
Adjective
Lunch included an entrée of macaroni and cheese consumed ad libitum. Ncbi Rofl, Discover Magazine, 26 May 2011 Sessions differed by the alternation of these foods: No-Repetition session with M-F-C-B; Single-Repetition session with F-M-F-B-C-B; Multiple-Repetition session with M-F-M-F-M-F-C-B-C-B-C-B. Final intakes of F and B were ad libitum. Ncbi Rofl, Discover Magazine, 16 Apr. 2013 Participants were then presented with an ad libitum meal. Julia Musto, Fox News, 29 Sep. 2021 The researchers found that, in the calorie restriction group, levels of total cholesterol and LDL cholesterol decreased significantly after one year, and that change was maintained at two years, while changes were very small in the ad libitum group. Jacqueline Howard, CNN, 11 July 2019

Word History

Etymology

Adverb

borrowed from Medieval Latin, "in accordance with one's wishes"

Adjective

after ad libitum entry 1

First Known Use

Adverb

1606, in the meaning defined above

Adjective

1786, in the meaning defined above

Time Traveler
The first known use of ad libitum was in 1606

Dictionary Entries Near ad libitum

Cite this Entry

“Ad libitum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ad%20libitum. Accessed 26 Dec. 2024.

Kids Definition

ad libitum

adjective
ad li·​bi·​tum
(ˈ)ad-ˈlib-ət-əm
: freely as one wishes
used as a direction in music
Etymology

Adjective

modern Latin, "according to one's desire"

Medical Definition

ad libitum

adverb
ad li·​bi·​tum (ˈ)ad-ˈlib-ət-əm How to pronounce ad libitum (audio)
: ad lib

More from Merriam-Webster on ad libitum

Love words? Need even more definitions?

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