the Iron Age

: a silver-white malleable ductile magnetic heavy metallic element that readily rusts in moist air, occurs native in meteorites and combined in most igneous rocks, is the most used of metals, and is vital to biological processes — see Chemical Elements Table

: something made of iron: such as

: shackles for the hands or legs

: of, relating to, or made of iron

: resembling iron

: strong and healthy : robust

: to furnish or cover with iron

: to shackle with irons

: to smooth with or as if with a heated iron

: the time of life at which some particular qualification, power, or capacity arises or rests

: one of the stages of life

: the length of an existence extending from the beginning to any given time

: to become old : show the effects or the characteristics of increasing age

: to acquire a desirable quality (such as mellowness or ripeness) by standing undisturbed for some time

: to cause to become old

: aggregate : collection

: action : process

: cumulative result of