adj.
Being the only example of its kind; unique: "sui generis works like Mary Chesnut's Civil War diary" (Linda Orr).
[Latin suī generis : suī, of its own + generis, genitive of genus, kind.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.