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Definitions of dojo on the Web:

• A dojo||dōjō is a Japanese term which literally means "place of the way". Initially, dōjō were adjunct to temples. ...
  en.wikipedia.org/wiki/Dojo

• Dojo is a character from the toyline, comic books and cartoon series.
  en.wikipedia.org/wiki/Dojo_(G.I._Joe)

• The dojo is a hybrid instrument designed as a cross between the Dobro-style guitar and the banjo. The body and resonator are like the Dobro, while it is strung like a five-string banjo. The tunings and fingerings are also just like a banjo. ...
  en.wikipedia.org/wiki/Dojo_(instrument)

• A training facility, usually led by one or more sensei
  en.wiktionary.org/wiki/dojo

• Exercise hall, the place where one practices the martial arts.
  www.yoshinjitsu.com/DZR_Japanese_Dictionary.html

• Literally "place of the Way." Also "place of enlightenment." The place where we practice aikido. Traditional etiquette prescribes bowing in the direction of the shrine (KAMIZA) or the designated front of the dojo (SHOMEN) whenever entering or leaving the dojo.
  www.cardiffaikikai.co.uk/aikido_dictionary.htm

• “sacred hall of learning”
  www.essortment.com/all/karateterminolo_raan.htm

• The Dojo Toolkit is a modular open source JavaScript toolkit (or library), designed to ease the rapid development of JavaScript- or Ajax-based applications and web sites.
  publib.boulder.ibm.com/infocenter/wdfhelp/v6r1m2/topic/com.ibm.dashboard.doc/wdf/wdf_glossary.html

• training hall
  www.scnf.org/jibiki.html

• A training hall for traditional Japanese arts, including Aikido and other martial arts. Literally, do means way and jo means place.
  www.aikido-of-charlottesville.org/dictionary.html

• This is the room or area where judo is learned and practiced.
  www.fuzilogik.com/index.php/Sports-Library/Judo/Judo-Glossary.html

• Practice hall or studio
  phoenix-taiko-kai.com/taikoterms/

• A structured environment where people are taught the way to transform themselves through traditional martial arts training.
  www.mkausa.com/glossary.html

• DOJO is the word used to describe the Martial Arts Temple of Learning. It means "place to learn the way"
  www.kami-do.com/coursework/beginner/beg_terms.htm

• Boss: Shogun Note: This level is not present in the arcade version.
  www.experiencefestival.com/a/Teenage_Mutant_Ninja_Turtles_arcade_game_-_Levels/id/5508748