from The American HeritageĀ® Dictionary of the English Language, 4th Edition

  • n. A joint host, as of a social event.
  • transitive v. To serve as a joint host of: "In 1980, [he] co-hosted another event for large contributorsā€ ( New Yorker).

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A joint host alongside another (compare costar).
  • v. To act as a joint host.
  • v. To store data on a shared server (as in web hosting).


Sorry, no etymologies found.


  • Consider, for example, the teaser for People magazine's cover story on Joan Lunden's divorce: "After the painful end of her 13-year marriage, the Good Morning America cohost is discovering a new life as a single mother -- and as her own woman."

    Dan Quayle Was Right

  • "Her cohost is the one who interviewed me," she continued.

    E! Online (US) - Top Stories

  • Chris Isaak's has a show on the BIO channel, and his cohost is a dog named Rodney.


  • James Franco, a best actor nominee for the survival tale 127 Hours, will cohost the Oscar presentation with actress Anne Hathaway.

    Hollywood Gets Ready for Oscars

  • Michael Giltz is the cohost of Showbiz Sandbox, a weekly pop culture podcast that reveals the industry take on entertainment news of the day and features top journalists and opinion makers as guests.

    Michael Giltz: CDs Of The Week: Ladysmith Black Mambazo and David Wax Museum

  • There's also a new regular judge this year: Ru's onetime VH1 cohost, Michelle Visage, joining Santino Rice.

    Tonight's TV Hot List: Monday, Jan. 24, 2011

  • *Decades later, Williams would cohost a show on Atlanta public-access television and always appear in overalls, which he often paired with a jaunty red silk shirt.

    Burial for a King

  • Despite the measures used to speed up the program, cohost Steve Martin could not resist poking fun at the length of the show.

    Low Budget Wins the Day

  • "Most of the time it's not good for business," says Richard Laermer, author of 2011: Trend-Spotting and former cohost of TLC's reality show Taking Care Of Business.

    Reality TV Stars Turned Entrepreneurs

  • In May, Romans hosted a very pregnant installment of "Your Bottom Line" alongside pregnant cohost Stephanie Elam and pregnant guest Donna Rosato.

    Christine Romans Has Baby Boy

Wordnik is becoming a not-for-profit! Read our announcement here.


Log in or sign up to get involved in the conversation. It's quick and easy.