—v.t. 1. to sit upon (eggs) for the purpose of hatching.
2. to hatch (eggs), as by sitting upon them or by artificial heat.
3. to maintain at a favorable temperature and in other conditions promoting development, as cultures of bacteria or prematurely born infants.
4. to develop or produce as if by hatching; give form to: His brain was incubating schemes for raising money.
—v.i. 1. to sit upon eggs.
2. to undergo incubation.
3. to develop; grow; take form: A plan was slowly incubating in her mind.