Open optional Synonyms

Definitions for Open

(adjective) allowing passage without obstruction
(adjective) freely available for use or participation by all
(adjective) being in a situation where one is likely to meet with harm

OO abbreviation

OO is an abbreviation for Open Optional

What does OO stand for?

OO stands for "Open Optional"

Optional replaced

open alternative

Definitions for Optional

(adjective) subject to one's freedom of choice
(adjective) possible but not necessary; left to personal choice