Definify.com
Webster 1913 Edition
Cata
Cat′a
.[Gr.
κατά
.] The Latin and English form of a Greek preposition, used as a prefix to signify
down
, downward
, under
, against
, contrary
or opposed to
, wholly
, completely
; as in cataclysm, catarrh. It sometimes drops the final vowel, as in catoptric; and is sometimes changed to cath, as in cathartic, catholic.