1. Situated at or extending to great depth; too deep to have been sounded or plumbed
   "unplumbed depths of the sea"
   - profound, unfathomed, unsounded

See also: deep

• object-oriented database management system
• object-oriented programing
• object-oriented programing language
• object-oriented programming
• object-oriented programming language
• objectification
• objectify
• objection
• objectionable
• objectionableness
• objectionably
• objective
• objective case
• objective lens
• objectively
• objectiveness
• objectivism
• magazine article
• magazine publisher
• magazine rack
• magdalen
• Magdalena
• Magdalena River
• Magdalene
• mage