Meaning : Sitting on eggs so as to hatch them by the warmth of the body.
Synonyms : incubation
Meaning : Persistent morbid meditation on a problem.
Synonyms : pensiveness
Meaning : Deeply or seriously thoughtful.
Example :
Byron lives on not only in his poetry, but also in his creation of the `Byronic hero' - the persona of a brooding melancholy young man.
Synonyms : broody, contemplative, meditative, musing, pensive, pondering, reflective, ruminative