WordNet sense 1 (belonging to some prior time):

erstwhile, former, quondam, sometime, onetime

WordNet sense 2 (earlier than the present time; no longer current):

past

WordNet sense 3 (impressive by reason of age):

venerable

WordNet sense 4 (too old to be useful):

overaged

WordNet sense 5 (somewhat elderly):

oldish

WordNet sense 6 (showing characteristics of age, especially having grey or white hair):

gray, hoary, gray-headed, hoar

WordNet sense 7 (mentally or physically infirm with age):

senile

WordNet sense 8 (very old):

ancient

WordNet sense 9 (growing old):

aging, ageing

WordNet sense 10 (having attained a specific age; (`aged' is pronounced as one syllable)):

aged, aged, of age

WordNet sense 11 (advanced in years; (`aged' is pronounced as two syllables)):

elderly, senior, older

WordNet sense 12 (ancient):

rusty

WordNet sense 13 (no longer new; uninteresting):

stale

WordNet sense 14 (made in or typical of earlier times and valued for its age):

antique

WordNet sense 15 (so extremely old as seeming to belong to an earlier period):

antediluvian, antiquated, archaic

WordNet sense 16 ((used informally especially for emphasis)):

honest-to-goodness, honest-to-god, sure-enough

WordNet sense 17 (not fake or counterfeit):

echt, genuine

WordNet sense 18 (well known or easily recognized):

familiar

WordNet sense 19 (having experience; having knowledge or skill from observation or participation):

experienced, experient

WordNet sense 20 (of an early stage in the development of a language or literature):

early

WordNet sense 21 (just preceding something else in time or order):

previous

WordNet sense 22 (existing or coming before):

preceding