extended 1 ( To be ) Adjective part of to extend . Not wrinkled, not folded, etc. 2 ( To be ) Spread or occupying a lot of space. 3 ( To be ) Lying with the body stretched. 4 ( To be ) In the form of a plate, or is much more extensive than high or deep: Layer is an extended mass of some substance . Thin. 5 ( To be ) Used by many people: The custom of cold dine is very widespread . Generalized Current. 6 m Action or operation to extend: The spread of the varnish layer has to be done quickly .