Definify.com
Webster 1913 Edition
Triweekly
Tri′weekˊly
,Adj.
[Pref.
tri-
+ weekly
.] Occurring or appearing three times a week; thriceweekly;
– as, a
. triweekly
newspaperadv.
Three times a week.
Noun.
A triweekly publication.
☞ This is a convenient word, but is not legitimately formed. It should mean occurring once in three weeks, as triennial means once in three years. Cf.
Biweekly
.