1. The act of extending or the condition of being extended. 2. The wire has an extension of 50 feet. 3. The act of straightening or extending a limb. 4. The position assumed by an extended limb. 5. The application of traction to a fractured or dislocated limb to restore the normal position. 6. an extension for the vacuum cleaner; built a new extension onto the hospital wing. 7. An additional telephone connected to a main line. 8. An allowance of extra time, especially for the repayment of a debt. 9. three months' extension on the loan. 10. The property of an object by which it occupies space. 11. A program in a university, college, or school that offers instruction, as by television or correspondence, to persons unable to attend at the usual time or in the usual place. 12. The class of objects designated by a specific term or concept; denotation. 13. A set that includes a given and similar set as a subset. 14. an extension ladder; an extension cord.
