AC45

noun

A catamaran sailing racing yacht, with a wingsail mainsail, developed for the 2013 America's Cup world tour, the 2013 America's Cup pre-regatta tune-up league, called the America's Cup World Series.

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Meanings

nounAC45 (plural AC45s or AC45's)

plural AC45s · plural AC45's

  1. hobbiesA catamaran sailing racing yacht, with a wingsail mainsail, developed for the 2013 America's Cup world tour, the 2013 America's Cup pre-regatta tune-up league, called the America's Cup World Series.

Origin

From America's Cup + 45, because it measures approximately 45 feet on the waterline.

Full word history & related roots →
Cite this entry
APA

AC45. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/AC45

MLA

“AC45.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/AC45. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “AC45,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/AC45.

Source: AC45 on Wiktionary, CC BY-SA 4.0.