That dates far back into the past; of ancient origin; made or formed long ago. Also: poetic having always existed; primeval. (In Old English and…

That has grown old, inveterate.

That has existed for a long time, having a long history; of great age; old and venerable. Usually with positive connotations. Now somewhat archaic.

Grown old; = inveterate, adj. 1.

Ancient; primitive.

figurative and in figurative contexts. Ancient, old; of long standing; time-worn; decrepit. Cf. grey-haired, adj. 2. Now rare.

Hence: having existed long, and now, in consequence, possessing the attributes of lengthened existence; long-established; time-worn; hoary.

Of things: Grey with age, venerable, ancient.

Rendered or become inveterate; confirmed by age or long continuance.

Long-established; long-standing, inveterate. Obsolete.

That has existed or continued for a long time; of old standing; aged. (Obsolete or blended with 2.)

†(a) that has continued or existed for a long time, long-standing (obsolete); (b) extending to a distant date in the future; esp. (Stock Market)…

Ancestral, ancient, of long standing.

Old, ancient; venerable; old-fashioned.

that has stood or existed long; long-standing.

figurative and in figurative contexts. Ancient, old; of long standing; time-worn; decrepit. Cf. grey-headed, adj. 2.

Loosely: that has lasted a very long time; inveterate; very old. Obsolete. rare.

= avitic, adj.

Ancient, antique, old.

That has been practised or adhered to for a long time; old, ancient. Cf. time-honoured, adj. 2.

as adj. Inveterate.

= avital, adj.