ETYM Latin defunctus, p. p. of defungi to acquit one's self of, to perform, finish, depart, die; de + fungi to perform, discharge: cf. French défunt. Related to Function.
Having ceased to exist or live.

ETYM Latin obsolescens, -entis, p. pr. of obsolescere, to wear out gradually, to fall into disuse; ob (see Ob-) + solere to use, be wont.
Becoming obsolete.

ETYM Latin obsoletus, p. p. of obsolescere. Related to Obsolescent.
Old; no longer in use or valid or fashionable; SYN. outdated, out-of-date, superannuated.

Being out of date; antiquated.