n. A sitting on eggs for the purpose of hatching young; a brooding on, or keeping warm, (eggs) to develop the life within, by any process.n. The development of a disease from its causes, or its period of incubation. (See below.)n. A sleeping in a consecrated place for the purpose of dreaming oracular dreams.n. The maintenance (of a living organism, such as microorganisms or a premature baby) in appropriate conditions, such as of temperature, humidity, or atmospheric composition, for growth.n. The gradual development in some interior environment, until fully formed.