hashtag

Noun

A metadata tag, signaled by a preceding hash sign (#), used to label content.
The hash sign itself, when used as part of a hashtag.

Verb

To label (a message) with a hashtag.

Origin / Etymology

From earlier hash tag, from hash (sign) + tag. The hash sign # was initially proposed as tag hash by Chris Messina to create groups on Twitter, modeled after the IRC channel prefix. First published use as hash tag by Stowe Boyd in 2007.

Scrabble Score: 14

hashtag: valid Scrabble (US) TWL Word
hashtag: valid Scrabble Word in Merriam-Webster MW Dictionary
hashtag: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 13

hashtag: valid Words With Friends Word