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The quality of being debonair; good humor; gentleness; courtesy. Sterne.

The quality of being deceitful; as, the deceitfulness of a man's practices.

The quality or state of being decent, suitable, or becoming, in words or behavior; propriety of form in social intercourse, in actions, or in discourse; proper formality; becoming ceremony; seemliness; hence, freedom from obscenity or indecorum; modesty. Observances of time, place, and of decency in general. Burke. Imm…

The quality or state of being deciduous.

The quality of being decided; prompt and fixed determination; unwavering firmness; as, to manifest great decision.

Having the power or quality of deciding a question or controversy; putting an end to contest or controversy; final; conclusive. "A decisive, irrevocable doom." Bates. "Decisive campaign." Macaulay. "Decisive proof." Hallam.

ase; to be diminished gradually, in size, degree, number, duration, etc., or in strength, quality, or excellence; as, they days decrease in length from June to December. He must increase, but I must decrease. John iii. 30.

The quality of being deducible; deducibility.

The state or quality of being deep, profound, mysterious, secretive, etc.; depth; profundity; -- opposed to shallowness. Because they had no deepness of earth. Matt. xiii. 5.

Deficiency in amount or quality; a falling short; lack; as, a deficit in taxes, revenue, etc. Addison.

The quality of being definitive.

The state or quality of being deflagrable. The ready deflagrability . . . of saltpeter. Boyle.

The quality of being deft. Drayton.

To fall off from the normal quality or the healthy structure of its kind; to become of a lower type.

One of a series of progressive steps upward or downward, in quality, rank, acquirement, and the like; a stage in progression; grade; gradation; as, degrees of vice and virtue; to advance by slow degrees; degree of comparison.

Hurtful; noxious; destructive; pernicious; as, a deleterious plant or quality; a deleterious example. -- Del`e*te"ri*ous*ly, adv. -- Del`e*te"ri*ous*ness, n.

The quality of being deliberate; calm consideration; circumspection.

The quality of being delicate.

The quality of being delicious; as, the deliciousness of a repast.

The quality of being demonstrable; demonstrableness.