ˌse-mē,
-ˌmī,
-mi
1
a
: precisely half of:
(1)
: forming a bisection of
semidiameter
(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-
2
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
Saman Shafiq, USA Today, 8 Apr. 2025
At least one person died and two others were injured in a crash between three semis and four other vehicles in Palmer County, said Cesar Marquez, city manager and fire chief in Bovina.
—Phil Helsel, NBC News, 16 Mar. 2025
The driver of the semi was taken to hospital with non-life-threatening injuries.
—Mary Gilbert, CNN, 5 Mar. 2025
Calvary Christian defeated Cardinal Gibbons 72-58 in the Class 3A state semi.
—Alex Kushel, Sun Sentinel, 2 Mar. 2025
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
The Brown County Sheriff's Office said in a post on Facebook that the accident involving the semi and train occurred around 2:15 p.m. April 4 on US-14 in Sleepy Eye, about 100 miles southwest of Minneapolis.
—Saman Shafiq, USA Today, 8 Apr. 2025
At least one person died and two others were injured in a crash between three semis and four other vehicles in Palmer County, said Cesar Marquez, city manager and fire chief in Bovina.
—Phil Helsel, NBC News, 16 Mar. 2025
The driver of the semi was taken to hospital with non-life-threatening injuries.
—Mary Gilbert, CNN, 5 Mar. 2025
Calvary Christian defeated Cardinal Gibbons 72-58 in the Class 3A state semi.
—Alex Kushel, Sun Sentinel, 2 Mar. 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 6 May. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share