To extend something is to make it longer, either physically or in terms of time. Anything extended has been stretched out in this way. An extended rubber band will snap back or break. An extended hose can be used to put out a fire. If you live with your parents in your twenties, it's like an extended childhood. Define extended. extended synonyms, extended pronunciation, extended translation, English dictionary definition of extended. adj. 1. Stretched or pulled out: an extended telescope. 2. Continued for a long period of time; protracted: had an extended vacation in the Alps. to be or become extended; stretch out in length, duration, or in various or all directions. to reach, as to a particular point. to increase in length, area, scope, etc. Manège. (of a horse) to come into an extended attitude. (Definition of extended from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press) CarePort Care Management, CarePort Referral Management, and CarePort Referral Intake Adjective extended (comparative more extended, superlative most extended) Longer in length or extension; elongated. Stretched out or pulled out; expanded. Lasting longer; protracted. Something that is extended has been fully stretched out or elongated. An extended period of time is an extremely long period of time. The meaning of EXTENDED is drawn out in length especially of time. How to use extended in a sentence. Synonyms for EXTENDED: metaphoric, figurative, figural, symbolic, tropical, tropological, emblematic, euphemistic; Antonyms of EXTENDED: literal, nonfigurative, nonmetaphorical, nonsymbolic, narrow, limited, restricted, circumscribed Extended replaces siloed markets with a unified margin system, enabling users to trade crypto and TradFi, use multiple assets as collateral, earn yield, and manage it all within a single account.