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/ˌpɜː(ɹ)pɪˈtjuːɪti/ · noun
(uncountable) The quality or state of being perpetual; endless duration; uninterrupted existence..
Mr. Waller adds that when the railway was authorised in 1897, one of the clauses of the Act authorising the transfer of the line to the North British Railway provided that that company should work it in perpetuity, and it was this clause that caused the interim interdict to be granted.
The gnomic belief that the world is conditioned by love is no idle apothegm. Love, as the instrument of creative agencies and cosmic perpetuity, is no banausic conception.
Use perpetuity when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Perpetuity means (uncountable) The quality or state of being perpetual; endless duration; uninterrupted existence..
Common synonyms include endlessness, eternity.
The opposite depends on the specific sense.
Mr. Waller adds that when the railway was authorised in 1897, one of the clauses of the Act authorising the transfer of the line to the North British Railway provided that that company should work it in perpetuity, and it was this clause that caused the interim interdict to be granted.
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