| The Term. | Extensional Use. | | Intensional Use. |
| tree. | maple, oak, beech. |  | roots, branches, trunk. |
| or |
| woody-fiber, sap, bark. |
| house. | stone, brick, cement. | | foundation, frame-work, roof. |
| dog. | shepherd, fox terrier, bull. | | carnivorous, quadruped, propensity to bark. |
| book. | textbook, dictionary, encyclopaedia. | | cover, leaves, binding. |
| quadrilateral. | trapezium, trapezoid, parallelogram. | | four sides, four angles, limited plane. |
| logic. | theoretical logic, applied logic, educational logic. | | science of thinking, art of right thinking, treats of laws of thought. |
| star. | Sirius, Arcturus, Vega. | | heavenly body, gives light and heat, twinkles. |
| force. | gravitation, molecular, atomic. | | produces motion |
| changes motion |
| destroys motion. |
| term. | general, singular, non-connotative. | | word or group of words, definite idea. |
| government. | monarchy, aristocracy, democracy. | | body of people, established form of law, banded together for mutual protection. |
| bird. | crow, robin, pigeon. | | biped, feathered, winged. |