derived from experiment and observation rather than theory; "an empirical basis for an ethical theory"; "empirical laws"; "empirical data"; "an empirical treatment of a disease about which little is known"
living things collectively; "the oceans are teeming with life"
the experience of being alive; the course of human events and activities; "he could no longer cope with the complexities of life"
a motive for living; "pottery was his life"
a living person; "his heroism saved a life"
the organic phenomenon that distinguishes living organisms from nonliving ones; "there is no life on the moon"
the course of existence of an individual; the actions and events that occur in living; "he hoped for a new life in Australia"; "he wanted to live his own life without interference from others"
a characteristic state or mode of living; "social life"; "city life"; "real life"
the period during which something is functional (as between birth and death); "the battery had a short life"; "he lived a long and happy life"
the period between birth and the present time; "I have known him all his life"
the period from the present until death; "he appointed himself emperor for life"
the branch of quantum physics that accounts for matter at the atomic level; an extension of statistical mechanics based on quantum theory (especially the Pauli exclusion principle)
discovered or determined by scientific observation; "variation in the ascertained flux depends on a number of factors"; "the discovered behavior norms"; "discovered differences in achievement"; "no explanation for the observed phenomena"