OTL may stand for: Oradea Transport Local Over-the-line, a variant of softball played mostly in Southern California Over time limit Output transformerless, a vacuum tube amplifier topology Outside the Lines, an American sports television series focusing on off-the-field stories Oracle Template Library An emoticon representing a kneeling or bowing person Overtime loss in ice hockey Otl Aicher, a graphic designer and typographer South Airlines, by ICAO airline code Ottawa Tool Library On the Loose, an outing club for the Claremont Colleges in Claremont, California, United States