Meaning of SEMI- in English


in pronunciations below, | ̷ ̷(ˌ) ̷ ̷ . |semē or |seˌmī or |semi or ( usu not before vowels ) |semə prefix

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


a. : precisely half of:

(1) : forming a bisection of

semi ellipse

semi chord

semi cylinder

(2) : being a usually vertically bisected form of (a specified architectural feature)

semi arch

semi bay

semi dome

b. : half in quantity or value : half of or occurring halfway through (a specified period of time)

semi revolution

semi annual

semi centenary

semi phase

— compare bi-


a. : to some extent : partly : incompletely

semi -independent

semi dry

semi plastic

semi acid

semi quantitatively

— compare demi- , hemi-

b. : having (a specified characteristic) for half the length or on one side

semi pinnate

semi adherent


a. : partial : incomplete

semi positivism

semi education

semi adherent

semi -Augustinianism

semi wig

b. : having some of the characteristics of (a specified class or object)

semi luxury

semi campus

semi benzene

semi porcelain

semi citizen

c. : quasi-

semi governmental

semi judicial

semi monastic

semi ubiquitous

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.