semi

1 of 4

noun (1)

plural semis
: semifinal
often used in plural

semi

2 of 4

noun (2)

plural semis

semi

3 of 4

noun (3)

plural semis
chiefly British
: a semidetached house

semi-

4 of 4

prefix

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
: to some extent : partly : incompletely
semicivilized
semi-independent
semidry
compare demi-, hemi-
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
Noun
Both vehicles suffered extensive front-end damage, despite the semi taking evasive actions in the moment before the crash, Porath said. Anna Lazarus Caplan, Peoplemag, 20 June 2024 Guzman Lopez lost to Phogat in the semi but got moved up to the gold match. John Cherwa, Los Angeles Times, 8 Aug. 2024 Multiple police and fire agencies from nearby jurisdictions assisted the injured with medical treatment and to clean up diesel that spilled from the semi, Porath said. Natalie Neysa Alund, USA TODAY, 20 June 2024 The driver of the semi, a 57-year-old La Farge man, was treated for minor injuries and released from the hospital, Schmidt said. Drake Bentley, Journal Sentinel, 28 May 2024 See all Example Sentences for semi 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'semi.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Noun (3)

short for semidetached

Prefix

Middle English, from Latin; akin to Old High German sāmi- half, Greek hēmi-

First Known Use

Noun (1)

1942, in the meaning defined above

Noun (2)

1942, in the meaning defined above

Noun (3)

1912, in the meaning defined above

Time Traveler
The first known use of semi was in 1912

Dictionary Entries Near semi

Cite this Entry

“Semi.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/semi. Accessed 18 Sep. 2024.

Kids Definition

semi-

prefix
ˌsem-i,
ˈsem-,
-ˌī
1
: half in amount or value
semitone
2
: occurring halfway through a certain time period
semiannual
3
: to some extent : partly : incompletely
semitropical
4
: partial : incomplete
semidarkness
Etymology

Prefix

Latin semi- "half"

More from Merriam-Webster on semi

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