sagan

S1A1G2A1N1
/ˈseɪɡən/

proper noun

A surname.

Less commonScrabble 6

Meanings

sagan1

nounsagan (plural sagans)

plural sagans

  1. Alternative letter-case form of Sagan.

    "There must be a sagan of them up there."

    1989, Edward S. Hudson, Alien Death Fleet, Pageant Books, published 1989, →ISBN, page 5
    3 more examples

    Part of it was that I just couldn't deal with a piece of primal matter floating around for sagans of years, eroding away until it became a nice, shiny, sharp-as-William-F.-Buckley's-tongue sword, with the old familiar "S" symbol coincidentally engraved on its hilt.

    1984 September 27, Jerry Boyajian, “re: Moriarty's long-awaited reviews”, in net.comics (Usenet)

    There are sagans of other planets crying out for this knowledge.

    1998 January, Jon Luini, Allen Whitman, “Finding Your Geek”, in EQ, page 132

    The Jet and xBase database engines have been pounded on by who knows how many developers and end-users for years, which amounts to sagans and sagans of hours of real-world testing!

    2001 October 24, Joe \"Nuke Me Xemu\" Foster, “Re: Randomly write data to a file”, in comp.lang.basic.visual.misc (Usenet)

Sagan2

proper nounSagan (plural Sagans)

plural Sagans

nounSagan (plural Sagans)

plural Sagans · alternative sagan

  1. humorousslangA large number equal to at least four billion.

    Today, there is a well-known joke unit of measurement called a Sagan. a Sagan is four billion—the smallest number that could fit the description "billions and billions."

    2014, Gabrielle Borisovna, Carl Sagan

Sagan3

proper noun
  1. A village in Sardasht Rural District, in the Central District of Bashagard County, Hormozgan Province, Iran.

Sagan4

proper noun
  1. alternativeAlternative form of Sakan (village in West Azerbaijan, Iran).

Sagan5

proper noun
  1. A river in southern Ethiopia.
    1 more example

    I had resolved to pass along the eastern shore of Lake Ganjule, in order to solve the problem of the sources of the river Sagan, the largest affluent of Lake Stefanie, which was supposed to flow out of Lake Ganjule. This I found to be not the case. The sources of the Sagan lie east of the south end of Lake Abaya. But there is a broad channel connecting Lake Ganjule with the Sagan.

    1904, Oscar Neumann, From the Somali Coast Through Southern Ethiopia to the Sudan, U.S. Government Printing Office, →OCLC, page 784
  2. A town in southern Ethiopia, named for the river.

Origin

The unit is derived from the phrase "billions and billions (of stars)", erroneously attributed to the American astronomer Carl Sagan. The lower bound of such a number must be two billion plus two billion, or four billion. Johnny Carson popularized the phrase through his occasional impersonation of Sagan throughout his career.

Full word history & related roots →

Rhymes & wordplay

Rhymes with sagan

All rhymes →

Anagrams

Cite this entry
APA

sagan. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/sagan

MLA

“sagan.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sagan. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “sagan,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/sagan.

Source: sagan on Wiktionary, CC BY-SA 4.0.