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
Joseph O'Sullivan, Forbes.com, 27 July 2025
Though Dunham has emphasized the semi in semi-autobiographical, references to Dunham’s real life abound, from the disastrous breakup that launched Dunham across the Atlantic to the little hairless dog, Astrid.
—Fran Hoepfner, Vulture, 10 July 2025
The semi struck the bus, which rolled over on the right side.
—Harriet Ramos, Fort Worth Star-Telegram, 18 July 2025
Valderrama, 70, was killed at around 6:20 a.m. when a 2013 white Freightliner semi truck struck him on I-75 southbound near Weston, FHP said.
—Grethel Aguila, Miami Herald, 13 July 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
Jhon Arias To Wolverhampton Wanderers Jhon Arias has moved to Wolverhampton Wanderers in the Premier League, leaving FIFA 2025 Club World Cup semi finalists Fluminense for an initial fee of $20 million.
—Joseph O'Sullivan, Forbes.com, 27 July 2025
Though Dunham has emphasized the semi in semi-autobiographical, references to Dunham’s real life abound, from the disastrous breakup that launched Dunham across the Atlantic to the little hairless dog, Astrid.
—Fran Hoepfner, Vulture, 10 July 2025
The semi struck the bus, which rolled over on the right side.
—Harriet Ramos, Fort Worth Star-Telegram, 18 July 2025
Valderrama, 70, was killed at around 6:20 a.m. when a 2013 white Freightliner semi truck struck him on I-75 southbound near Weston, FHP said.
—Grethel Aguila, Miami Herald, 13 July 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 Aug. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share