based on or manifesting objectively defined standards of rightness or morality; "principled pragmatism and unprincipled expediency"; "a principled person"
(of quantities) imprecise but fairly close to correct; "lasted approximately an hour"; "in just about a minute"; "he's about 30 years old"; "I've had about all I can stand"; "we meet about once a month"; "some forty people came"; "weighs around a hundred pounds"; "roughly $3,000"; "holds 3 gallons, more or less"; "20 or so people were at the party"
conforming to accepted standards of social or professional behavior; "an ethical lawyer"; "ethical medical practice"; "an ethical problem"; "had no ethical objection to drinking"; "Ours is a world of nuclear giants and ethical infants"- Omar N. Bradley
adhering to ethical and moral principles; "it seems ethical and right"; "followed the only honorable course of action"; "had the moral courage to stand alone"
of or relating to the philosophical study of ethics; "ethical codes"; "ethical theories"
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"
having once lived or existed or taken place in the real world as distinct from being legendary; "the historical Jesus"; "doubt that a historical Camelot every existed"; "actual historical events"
of or relating to the study of history; "historical scholars"; "a historical perspective"
(used informally especially for emphasis); "a real honest-to-god live cowboy"; "had us a high old time"; "went upriver to look at a sure-enough fish wheel"
proper alignment; the property possessed by something that is in correct or proper alignment; "out of true"
accurately placed or thrown; "his aim was true"; "he was dead on target"
accurately fitted; level; "the window frame isn't quite true"
devoted (sometimes fanatically) to a cause or concept or truth; "true believers bonded together against all who disagreed with them"
consistent with fact or reality; not false; "the story is true"; "it is undesirable to believe a proposition when there is no ground whatever for supposing it true"- B. Russell; "the true meaning of the statement"
conforming to definitive criteria; "the horseshoe crab is not a true crab"; "Pythagoras was the first true mathematician"
as acknowledged; "true, she is the smartest in her class"
make level, square, balanced, or concentric; "true up the cylinder of an engine"