Pronunciation: (grā'du-bul), [key]
1. capable of being graded.
2. Gram.(esp. of adjectives and adverbs) denoting a quality or state that can be present in varying degree or extent; capable of undergoing comparison or intensification, as heavy—heavier, cheerful—more cheerful, or tall—very tall, but not atomic or dental.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.