adjective

1. without beginning or end; existing through all time; everlasting
2. of eternity
3. forever the same; always true or valid; unchanging the eternal verities
4. always going on; never stopping; perpetual eternal rest
5. seeming never to stop; happening very often her eternal complaints
6. Philos., Theol. outside or beyond time or time relationships; timeless

Etymology: ME < OFr < LL aeternalis < L aeturnus < aevum, an age < IE base *aiw-, *āju-, a life, vital force > aye