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From the M-W Editors
Origin and Etymology of semi
First Known Use of semi
1942
Other Automotive Terms
First Known Use of semi
1942
semi-
prefix
\
ˌse-mē
,
-ˌmī
,
-mi
\
Definition of semi-
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
3 a
:partial :incomplete
- semiconsciousness
- semidarkness
b
:having some of the characteristics of
- semiporcelain
c
:quasi-
- semigovernmental
- semimonastic
Origin and Etymology of semi-
Middle English, from Latin; akin to Old High German sāmi- half, Greek hēmi-
SEMI Defined for English Language Learners
semi-
prefix
Definition of semi- for English Language Learners
-
: half
-
: happening twice during a particular period of time
-
: partly : not completely
SEMI Defined for Kids
semi-
prefix
Definition of semi- for Students
1
:half
- semicircle
2
:partly :not completely
3
:partial
Learn More about semi
-
See words that rhyme with semi Nglish: Translation of semi for Spanish speakers Britannica English: Translation of semi for Arabic speakers
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