double dash

noun

: a graphic character consisting of two long parallel horizontal dashes of which the top one is heavy and the bottom one light that is sometimes used to mark page or column divisions in printed matter

called also oxford dash

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!