per diem

1 of 3

adverb

: by the day : for each day

per diem

2 of 3

adjective

1
: based on use or service by the day : daily
2
: paid by the day

per diem

3 of 3

noun

plural per diems
1
: a daily allowance
2
: a daily fee

Examples of per diem in a Sentence

Adverb Employees will be given $20 per diem for expenses. Noun He received a $30 per diem for food.
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
With the new addition, the jail's ICE detainee population soared — and so did its per diem rate. Kristine Phillips, IndyStar, 26 Aug. 2025 Travel, lodging and per diem may be reimbursed by the receiving agency, and the salary is listed as $25,684 to $191,900 per year, according to the listing. Alexandra Koch, FOXNews.com, 21 Aug. 2025
Noun
In addition to the raises, the new Delta contract includes improvements in benefits like vacation accrual, per diem payments while traveling, scheduling and retirement contributions. Niraj Chokshi, New York Times, 1 Mar. 2023 Howe said 2023 per diem rates for certified interpreters should be more in the order of $500 or $530 for a full day. Tonya Alanez, BostonGlobe.com, 5 Feb. 2023 See All Example Sentences for per diem

Word History

Etymology

Adverb

Medieval Latin

First Known Use

Adverb

15th century, in the meaning defined above

Adjective

1765, in the meaning defined at sense 1

Noun

1812, in the meaning defined at sense 1

Time Traveler
The first known use of per diem was in the 15th century

Browse Nearby Words

Cite this Entry

“Per diem.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/per%20diem. Accessed 10 Sep. 2025.

Kids Definition

per diem

adverb
per di·​em
(ˌ)pər-dē-əm,
-ˈdī-
: by the day : for each day
per diem adjective

Medical Definition

Perdiem

trademark
Per·​di·​em pər-ˈdē-ˌem, -əm How to pronounce Perdiem (audio)
used for a laxative preparation of psyllium seed husks and senna

Legal Definition

per diem

1 of 3 adverb
: by the day : for each day
paid per diem

per diem

2 of 3 adjective
1
: based on use or service by the day
per diem compensation
2
: paid or calculated by the day
per diem interest

per diem

3 of 3 noun
1
: a daily allowance
received a per diem for expenses
2
: a daily fee
paid a per diem for maintenance of the equipment
Etymology

Adverb

Latin

Last Updated: - Updated example sentences
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