1
as in interim
intended to last, continue, or serve for a limited time
will serve as the ad interim CEO until the merger of the two corporations is complete
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2
as in acting
serving in a position for the time being
an ad interim government until the new constitution goes into effect
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Recent Examples of ad interim
Senior Foreign Service, has been serving as the chargé d’affaires ad interim — essentially an acting ambassador when there is no one in the position — to South Korea since January.
—
Kaitlyn Schallhorn, Oc Register, 13 Apr. 2026
Lorenzo de Zavala helped draft the constitution of the Republic of Texas, and his fellow delegates elected him ad interim vice president of the new country.
—USA Today, 28 Sep. 2021
Other members of the U.S. delegation, according to the White House, include Raymond Greene, the Chargé d’Affaires ad interim at the U.S. Embassy in Tokyo, and Marcia Bernicat, senior official for economic growth, energy as well as the environment.
—Melissa Locker, Time, 4 Aug. 2021
The US Embassy in Seoul also lowered flags to honor the shooting victims, Chargé d'Affaires ad interim Rob Rapson said on Twitter.
—Madeline Holcombe, CNN, 19 Mar. 2021
Shawn Morgan will replace him on an ad interim basis for North America.
—Phoebe Wall Howard, Detroit Free Press, 11 June 2020
Kaitlyn Schallhorn, Oc Register, 13 Apr. 2026
Lorenzo de Zavala helped draft the constitution of the Republic of Texas, and his fellow delegates elected him ad interim vice president of the new country.
—USA Today, 28 Sep. 2021
Other members of the U.S. delegation, according to the White House, include Raymond Greene, the Chargé d’Affaires ad interim at the U.S. Embassy in Tokyo, and Marcia Bernicat, senior official for economic growth, energy as well as the environment.
—Melissa Locker, Time, 4 Aug. 2021
The US Embassy in Seoul also lowered flags to honor the shooting victims, Chargé d'Affaires ad interim Rob Rapson said on Twitter.
—Madeline Holcombe, CNN, 19 Mar. 2021
Shawn Morgan will replace him on an ad interim basis for North America.
—Phoebe Wall Howard, Detroit Free Press, 11 June 2020
Recent Examples of Synonyms for ad interim
Adjective
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The city’s release said Boise Airport Deputy Director of Finance and Business Development Kathleen Watkins would serve as interim director while a search begins to recruit Hupp’s replacement.—
Shannon Tyler
May 31,
Idaho Statesman,
31 May 2026
-
Helen Toner, interim executive director at Georgetown University’s Center for Security and Emerging Technology, said those differing descriptions about AI in the military are both true.—
ABC News,
ABC News,
31 May 2026
Adjective
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Pakistan has emerged as a key mediator between the US and Iran in recent months during the war in the Middle East, playing a leading role in negotiating a temporary ceasefire in April.—
Alayna Treene,
CNN Money,
30 May 2026
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Authority is temporary and shared equally among seven voices.—
Literary Hub,
Literary Hub,
29 May 2026
Cite this Entry
“Ad interim.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/ad%20interim. Accessed 5 Jun. 2026.
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