1. (adv.) Through eternity; through endless ages, eternally.

2. (adv.) At all times; always.

ad infinitum all-comprehensiveness all-inclusiveness always an eternity aye boundlessly boundlessness countlessness endless time endlessly endlessness eternally eternity ever ever and again ever and anon evermore exhaustlessness for all time for aye for good for keeps forever and aye forevermore illimitability illimitably immeasurability immeasurably immensely immensity in all ages in perpetuity incalculability incalculably incomprehensibility incomprehensibly inexhaustibility infinitely infiniteness infinitude infinity innumerability innumerably interminability interminably limitlessly limitlessness measurelessly measurelessness now and forever numberlessness perpetuity termlessness throughout the ages till doomsday till time stops time without end to infinity universality unmeasurability without end without limit world without end