ODN

Noun

  • Initialism of w:ordnance datum Used to judge the height above/below [[sea level in England, from the MSL (mean sea level) in Newlyn between 1915 and 1921.

Modern English dictionary

Explore and search massive catalog of over 900,000 word meanings.

Word of the Day

Get a curated memorable word every day.

Challenge yourself

Level up your vocabulary by setting personal goals.

And much more

Try out Vedaist now.