(of e.g. volcanos) permanently inactive; "an extinct volcano"
being out or having grown cold; "threw his extinct cigarette into the stream"; "the fire is out"
no longer in existence; lost or especially having died out leaving no living representatives; "an extinct species of fish"; "an extinct royal family"; "extinct laws and customs"
the scientific study of food and drink (especially in humans)
(physiology) the organic process of nourishing or being nourished; the processes by which an organism assimilates food and uses it for growth and maintenance