|Noah Webster's Dictionary|
1. (n.) The quality or state of being perpetual; as, the perpetuity of laws.
2. (n.) Something that is perpetual.
3. (n.) Endless time.
4. (n.) The number of years in which the simple interest of any sum becomes equal to the principal.
5. (n.) The number of years' purchase to be given for an annuity to continue forever.
6. (n.) A perpetual annuity.
7. (n.) Duration without limitations as to time.
8. (n.) The quality or condition of an estate by which it becomes inalienable, either perpetually or for a very long period; also, the estate itself so modified or perpetuated.
Int. Standard Bible Encyclopedia
PERPETUAL; PERPETUALLY; PERPETUITY
per-pet'-u-al, per-pet'-u-al-i, pur-pe-tu'-i-ti (`olam, netsach, tamidh):
Perpetual is usually the translation of `olam, properly, "a wrapping up" or "hiding," used often of time indefinitely long, and of eternity when applied to God; hence, we have, "for perpetual generations" (Genesis 9:12); "the priesthood by a perpetual statute" (Exodus 29:9; compare Exodus 31:16 Leviticus 3:17; Leviticus 24:9, etc.); "placed the sand for the bound of the sea, by a perpetual decree, that it cannot pass it" (Jeremiah 5:22, the Revised Version margin "an everlasting ordinance which it cannot pass"); "sleep a perpetual sleep" (Jeremiah 51:39, 57); "Moab shall be.... a perpetual desolation" (Zechariah 2:9), etc.; netsach, "preeminence," "perpetuity," "eternity" (often translated "for ever," Psalm 9:6), is translated "perpetual" (Psalm 74:3 Jeremiah 15:18); natsach (participle) (Jeremiah 8:5); tamidh, "continuance," generally rendered "continually," but sometimes "perpetual" or "perpetually" (Exodus 30:8 Leviticus 6:20).
"Perpetually" is the rendering of `adh, properly "progress," "duration," hence, long or indefinite time, eternity (usually in the King James Version rendered "for ever"), in Amos 1:11, "His anger did tear perpetually"; and of kol ha-yamim, "all the days" (1 Kings 9:3 2 Chronicles 7:16, "my heart shall be there perpetually"; compare Matthew 28:20, pasas tas hemeras, literally, "all the days").
Perpetuity occurs in the Revised Version (British and American) of Leviticus 25:23, 30, "The land shall not be sold in perpetuity," "The house.... shall be made sure in perpetuity."
Perpetual is frequent in the Apocrypha, most often as the translation of aionios and kindred words, e.g. Judith 13:20, "a perpetual praise"; The Wisdom of Solomon 10:14, "perpetual glory," the Revised Version (British and American) "eternal"; Ecclesiasticus 11:33, "a perpetual blot," the Revised Version (British and American) "blame for ever"; 1 Maccabees 6:44, "a perpetual name," the Revised Version (British and American) "everlasting"; aenaos, "ever-flowing," occurs in The Wisdom of Solomon 11:6 (so the Revised Version); endeleches, "constant" (Ecclesiasticus 41:6, "perpetual reproach").
For "perpetual" (Jeremiah 50:5 Habakkuk 3:6) the Revised Version has "everlasting"; for "the old hatred" (Ezekiel 25:15), "perpetual enmity"; for "perpetual desolation" (Jeremiah 25:12) "desolate forever," margin "Hebrew `everlasting desolations.' "
W. L. Walker
Perpetuity (5 Occurrences)
Hebrews 10:12 But he, having offered one sacrifice for sins, sat down in perpetuity at the right hand of God, (DBY)
Hebrews 10:14 For by one offering he has perfected in perpetuity the sanctified. (DBY)
Leviticus 25:23 "'The land shall not be sold in perpetuity, for the land is mine; for you are strangers and live as foreigners with me. (WEB JPS ASV RSV)
Leviticus 25:30 If it isn't redeemed within the space of a full year, then the house that is in the walled city shall be made sure in perpetuity to him who bought it, throughout his generations. It shall not be released in the Jubilee. (WEB JPS ASV RSV)
Isaiah 64:5 Thou meetest him that rejoiceth to do righteousness, those that remember thee in thy ways: (behold, thou wast wroth, and we have sinned:) in those is perpetuity, and we shall be saved. (DBY)