a combining form meaning “resembling,” “having some, but not all of the features of,” used in the formation of compound words: quasi-definition; quasi-monopoly; quasi-official; quasi-scientific.
Origin of quasi-
< Latin quasi as if, as though, equivalent to qua(m) as + sī if
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Related Words for quasi-professed, surface, appearing, illusive, illusory, ostensible, outward, specious
almost but not really; seeminglya quasi-religious cult
resembling but not actually being; so-calleda quasi-scholar
Word Origin for quasi-
from L., lit: as if
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
word-forming element used since 18c. (but most productively in 20c.) and typically meaning "kind of, resembling, like but not really, as if;" from Latin quasi "as if, as it were" (see quasi).
Online Etymology Dictionary, © 2010 Douglas Harper