Words related to millennial

millennium (n.)

1630s, "the 1,000-year period of Christ's anticipated rule on Earth" (Revelation xx.1-5); from Modern Latin millennium, from Latin mille "thousand" (see million) + annus "year" (see annual); formed on analogy of biennium, triennium, etc. For vowel change, see biennial. General (non-theological) sense of "an aggregate of 1,000 years, a period or interval of 1,000 years" is attested by 1711. Meaning "the year 2000 A.D." is attested by 1970.

[T]he men of the modern world—up to a generation ago anyway—saw 2000 as a millennial year in the light of science. Men were then to be freed of want, misery, and disease; reason and advanced technology would rule; all would finally be for the best in what would then be the undoubted best of all possible worlds. [Bulletin of the Atomic Scientists, December 1962]
-al (1)
suffix forming adjectives from nouns or other adjectives, "of, like, related to, pertaining to," Middle English -al, -el, from French or directly from Latin -alis (see -al (2)).
millennialism (n.)

1906, "millenarianism, belief in the coming or presence of the (Christian) millennium," from millennial + -ism. Related: Millennialist.

post-millennial (adj.)

also postmillennial, "relating to what may occur in the period following the millennium," 1831, from post- "after" + millennial; chiefly in reference to the Protestant doctrine that the second coming of Christ will occur after, not at, the Christian millennium. Related: Post-millennialism; post-millennialist.

premillennial (adj.)

1829, "existing or occurring before the millennium," especially in the theological sense of "before the Second Coming of Christ;" from pre- "before" + millennial (adj.). Premillenarian, one who believes the second coming of Christ will precede the Millennium, is from 1842. Related: Premillenialism.