ˌse-mē,
-ˌmī,
-mi
1
a
: precisely half of:
(1)
: forming a bisection of
semicircle
(2)
: being a usually vertically bisected form of (a specified architectural feature)
semidome
b
: half in quantity or value : half of or occurring halfway through a specified period of time
semiannual
semimonthly
compare bi-
3
a
: partial : incomplete
semiconsciousness
semidarkness
b
: having some of the characteristics of
semiporcelain
c
: quasi-
semigovernmental
semimonastic
Examples of semi in a Sentence
Recent Examples on the Web
Melina Khan, USA Today, 19 Feb. 2026
Strong winds could make driving conditions difficult, especially for semi-trucks and other high-profile vehicles.
—Chelsea Hylton, CBS News, 18 Feb. 2026
Velzeboer, 24, also set a world record in the 500 meters competition during the semi-finals on Thursday.
—Reuters, NBC news, 16 Feb. 2026
England reached the quarter-finals of the last World Cup in Qatar in 2022, narrowly losing to eventual runners-up France, and were beaten semi-finalists in Russia in 2018.
—Jack Pitt-Brooke, New York Times, 11 Feb. 2026
See All Example Sentences for semi
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.
Noun
In a news release, CSP said the crash included 29 passenger vehicles and seven semi-trucks.
—Melina Khan, USA Today, 19 Feb. 2026
Strong winds could make driving conditions difficult, especially for semi-trucks and other high-profile vehicles.
—Chelsea Hylton, CBS News, 18 Feb. 2026
Velzeboer, 24, also set a world record in the 500 meters competition during the semi-finals on Thursday.
—Reuters, NBC news, 16 Feb. 2026
England reached the quarter-finals of the last World Cup in Qatar in 2022, narrowly losing to eventual runners-up France, and were beaten semi-finalists in Russia in 2018.
—Jack Pitt-Brooke, New York Times, 11 Feb. 2026
See All Example Sentences for semi
Cite this Entry
“Semi.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/semi. Accessed 20 Feb. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
