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Webster 1913 Edition

Gregorian

Gre-go′ri-an

,
Adj.
[NL.
Gregorianus
, fr.
Gregorius
Gregory, Gr. [GREEK]: cf. F.
grégorien
.]
Pertaining to, or originated by, some person named Gregory, especially one of the popes of that name.
Gregorian calendar
,
the calendar as reformed by Pope Gregory XIII. in 1582, including the method of adjusting the leap years so as to harmonize the civil year with the solar, and also the regulation of the time of Easter and the movable feasts by means of epochs. See
Gregorian year
(below).
–
Gregorian chant
(Mus.)
,
plain song, or canto fermo, a kind of unisonous music, according to the eight celebrated church modes, as arranged and prescribed by Pope Gregory I. (called “the Great”) in the 6th century.
–
Gregorian modes
,
the musical scales ordained by Pope Gregory the Great, and named after the ancient Greek scales, as Dorian, Lydian, etc.
–
Gregorian telescope
(Opt.)
,
a form of reflecting telescope, named from Prof. James
Gregory
, of Edinburgh, who perfected it in 1663. A small concave mirror in the axis of this telescope, having its focus coincident with that of the large reflector, transmits the light received from the latter back through a hole in its center to the eyepiece placed behind it.
–
Gregorian year
,
the year as now reckoned according to the Gregorian calendar. Thus, every year, of the current reckoning, which is divisible by 4, except those divisible by 100 and not by 400, has 366 days; all other years have 365 days. See
Bissextile
, and Note under
Style
,
Noun.
, 7.

Webster 1828 Edition

Gregorian

GREGO'RIAN

,
Adj.
Denoting what belongs to Gregory. The Gregorian calendar, is one which shows the new and full moon, with the time of Easter, and the movable feasts depending thereon, by means of epacts. The Gregorian year, is the present year, as reformed by pope Gregory XIII, in 1582; consisting of 365 days, 5 hours, 48 minutes, 47 seconds, with an additional day every fourth year.

Definition 2024

Gregorian

Gregorian

See also: gregorian

English

Adjective

Gregorian

  1. Of or relating to a person named Gregory, especially any of the popes of that name.
  2. Of or pertaining to the Gregorian calendar.
    An average Gregorian year is 365.2425 days.
  3. Of or relating to James Gregory (mathematician), inventor of the Gregorian telescope.

Derived terms

Translations

Noun

Gregorian ‎(plural Gregorians)

  1. A member of the Brotherhood of Saint Gregory

gregorian

gregorian

See also: Gregorian

English

Adjective

gregorian

  1. Alternative letter-case form of Gregorian
    • 1988 April 8, Tom Boeker, “The Duchess of Malfi”, in Chicago Reader:
      Also, the play now opens and closes with a chant (definitely not gregorian, as that may have required some research) of Kyrie Eleison four times, not three, which is just enough to confound any Catholic in the audience and make Brecht roll over in his grave and puke.

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