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
Evie Carrick, Travel + Leisure, 11 Dec. 2025
All lanes on Interstate 70 have reopened after two semi-trailers, including one hauling cattle, crashed near Oak Grove, according to the Missouri Department of Transportation.
—Kansas City Star, 10 Dec. 2025
Rivers made it as a semi-finalist in this year's 2025 Hall of Fame class.
—James Brizuela, MSNBC Newsweek, 9 Dec. 2025
Meanwhile, electrifying semi-trailers has been limited by battery size, weight and charging downtime.
—Georgina Jedikovska, Interesting Engineering, 7 Dec. 2025
See All Example Sentences for semi
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Noun
Meals are taken care of by Chef Quinten Frye, a James Beard Award semi-finalist who partners with local farms and ranchers.
—Evie Carrick, Travel + Leisure, 11 Dec. 2025
All lanes on Interstate 70 have reopened after two semi-trailers, including one hauling cattle, crashed near Oak Grove, according to the Missouri Department of Transportation.
—Kansas City Star, 10 Dec. 2025
Rivers made it as a semi-finalist in this year's 2025 Hall of Fame class.
—James Brizuela, MSNBC Newsweek, 9 Dec. 2025
Meanwhile, electrifying semi-trailers has been limited by battery size, weight and charging downtime.
—Georgina Jedikovska, Interesting Engineering, 7 Dec. 2025
See All Example Sentences for semi
Cite this Entry
“Semi.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/semi. Accessed 15 Dec. 2025.
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