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

in tune; accurate in pitch

a true note

expressing or given to expressing the truth

a true statement

gave truthful testimony

having a legally established claim

the legitimate heir

the true and lawful king

determined with reference to the earth's axis rather than the magnetic poles

true north is geographic north

rightly so called

true courage

a spirit which true men have always admired

not pretended; sincerely felt or expressed

genuine emotion

her interest in people was unfeigned

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

proper alignment; the property possessed by something that is in correct or proper alignment

out of true

make level, square, balanced, or concentric

true up the cylinder of an engine