noun (plural Qs or Q's)
1The seventeenth letter of the alphabet.
- I encountered some difficulty when required to pronounce the letter Q.
- The Q virus infects the letter Q on your machine, causing potential damage to any document with a Q in it.
- The glossy alabaster white embossment was the silhouette of a horse with the letter Q on its flanks.
mind one's Ps and Qs
- see mind.