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
In the other semi Wednesday, Colombia after routing Panama will face Uruguay, which upset Brazil ion penalties, with Uruguay a slight betting pick. Greg Cote, Miami Herald, 7 July 2024 While still on the road, the two drivers were attempting to assist the individuals in the Dodge Journey when a Freightliner semi traveling northbound struck the left side of the Dodge. Angel Saunders, Peoplemag, 2 July 2024 Second seed Merrimack will host No. 4 LeMoyne in the other semi with the winners meeting on Tuesday for the conference title. Dom Amore, Hartford Courant, 6 Mar. 2024 The driver of the semi was treated and released from an area hospital. Brian Brant, Peoplemag, 29 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 24 Jul. 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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