The Collaborative International Dictionary
Sempiternal \Sem`pi*ter"nal\, a. [L. sempiternus, fr. semper always: cf. F. sempiternel.]
Of neverending duration; everlasting; endless; having beginning, but no end.
--Sir M. Hale.Without beginning or end; eternal.
--Blackmore.
Douglas Harper's Etymology Dictionary
Wiktionary
a. 1 Seemingly everlasting or eternal. 2 (context philosophy English) everlasting, that is having infinite temporal duration; as opposed to eternal, outside time and thus lacking temporal duration
WordNet
Wikipedia
Sempiternal is the fourth studio album by British rock band Bring Me the Horizon. It was released on 1 April 2013 worldwide through RCA, a subsidiary label of Sony Music Entertainment, and 2 April 2013 in the United States and Canada through Epitaph. It is the first album to feature former Worship keyboardist Jordan Fish and was believed to be the last album to feature guitarist Jona Weinhofen. However, Weinhofen's role within the album's development has been faced with controversy.
Written and recorded throughout 2012, Sempiternal showed the band pool diverse influences from electronic music, ambient music and pop. "Sempiternal" is an archaic English word denoting the concept of "everlasting time" that can never actually come to pass. It stems from the Latin word "sempiternus" (a concatenation of root "semper" and suffix "aeternum").
The album spawned four singles (" Shadow Moses"; " Sleepwalking"; " Go to Hell, for Heaven's Sake"; and " Can You Feel My Heart"). The album made its debut at No. 3 on the UK Album Chart and is their second successive album to top the ARIA Charts in Australia. It also managed to reach No. 11 on the US Billboard Chart with 27,522 first week sales, making Sempiternal the band's highest charting album in America until That's the Spirit debuted at No. 2 in 2015. Upon its release, the album received critical acclaim.
Usage examples of "sempiternal".
The Ohogan Mountains and the other non-volcanic ranges south of the Peninsula that bordered the Sempiternal Icecap began to experience unseasonal blizzards.
Her silver hair was frozen into a photographed stormtossed effect, clicked into sempiternal tempestuousness on a Wuthering Heights of the American imagination.
But here, beneath that canopy dotted with myriads of glittering worlds, intransmutable and sempiternal, the cries of battle and quarrels of men, the wail of widows and the laughter of children appeared futile and remote.