extensive

Concise Oxford English Dictionary © 2008 Oxford University Press:
extensive/ɪkˈstensɪv/

▶adjective

• 1 covering a large area.

  ■ large in amount or scale.

• 2 (of agriculture) obtaining a relatively small crop from a large area with a minimum of capital and labour. Often contrasted with intensive.

– derivatives
extensively adverb,
extensiveness noun.

– origin ME: from Fr. extensif, -ive or late L. extensivus, from extens-, extendere (see extend).