How long something has existed.

Roget 118: the present, the present time, the present day, the present moment, the present juncture, the present occasion; the times, the existing time, the time being; today, these days, nowadays, our times, modern times, the twentieth century; nonce, crisis, epoch, day, hour.    age, time of life.    ... show more

Roget 106: time, duration; period, term, stage, space, span, spell, season; the whole time, the whole period; space-time; course etc. 109; snap.    intermediate time, while, interim, interval, pendency^†; intervention, intermission, intermittence, interregnum, interlude; respite.    era, epoch; time of life, age, year, date; decade etc. (period) 108; moment, etc. (instant) 113.    glass of time, sands of time, march of time, Father Time, ravages of time; arrow of time; river of time, whirligig of time, noiseless foot of time; scythe.    ... show more

Roget 108: period, age, era; second, minute, hour, day, week, month, quarter, year, decade, decenniumm lustrum^†, quinquennium, lifetime, generation; epoch, ghurry^†, lunation^†, moon.    century, millennium; annus magnus [Lat.].    ... show more

Roget 124: oldness etc. adj.^†; age, antiquity; cobwebs of antiquity.    maturity; decline, decay; senility etc. 128.    seniority, eldership, primogeniture.    archaism etc. (the past) 122; thing of the past, relic of the past; megatherium^†; Sanskrit.    tradition, prescription, custom, immemorial usage, common law.    ... show more

Dutch: ouderdom
Polish: wiek

An era of history having some distinctive feature:
— We live in a litigious age.

synonym: historic period.

Dutch: tijdvak, tijdperk, era
Polish: czas, epoka, przedział czasowy, okres, era, czasy

A time of life (usually defined in years) at which some particular qualification or power arises:
— She was now of school age.

synonym: eld.

Dutch: epoch, volwassenheid, era, leeftijd, meerderjarigheid, tijd, ouderdom, tijdperk
Polish: wiek

A prolonged period of time:
— We've known each other for ages.

synonyms: long time, years.

Dutch: leeftijd
Polish: lata

A late time of life:
— Old age is not for sissies.
— Age hasn't slowed him down at all.

synonyms: eld, geezerhood, old age, years.

Roget 128: age; oldness^† etc. adj.; old age, advanced age, golden years; senility, senescence; years, anility^†, gray hairs, climacteric, grand climacteric, declining years, decrepitude, hoary age, caducity^†, superannuation; second childhood, second childishness; dotage; vale of years, decline of life, sear and yellow leaf" [Macbeth]; threescore years and ten; green old age, ripe age; longevity; time of life.    seniority, eldership; elders etc. (veteran) 130; firstling; doyen, father; primogeniture.    [Science of old age.] geriatrics, nostology^†.    ... show more

Dutch: levensavond, ouderdom
Polish: starość, podeszły wiek

Begin to seem older; get older.

Dutch: vergrijzen, verouderen, verouwelijken

Grow old or older:
— She aged gracefully.
— We age every day--what a depressing thought!.

synonyms: get on, maturate, mature, senesce.

Roget 124: be old etc. adj.; have had its day, have seen its day; become old etc. adj.; age, fade, senesce.   

Roget 128: be aged etc. adj.; grow old, get old etc. adj.; age; decline, wane, dodder; senesce.   

Make older.