OC noun 12adjective 3forms 1 noun12 •Officer of the Order of Canada. •(slang) Initialism of original character.Too often an OC tends to slip into a Mary Sue mould, but if it's well written, I have no problems with an OC as a protagonist of a fic. — 2005 •Initialism of overclock. •Initialism of out of character. •Initialism of original content. •Initialism of Officer Commanding. •Initialism of oleoresin capsicum. •Initialism of organizing committee.The union staff person works with the OC to assist in training, education, leadership development, etc. — 1994 •Initialism of open captioning. •Initialism of organizational climate. •Initialism of office consultation. •Initialism of office conference. adjective3 •Initialism of obsessive-compulsive. •Initialism of of color. •Initialism of on camera. formsOCs