drop letter

noun

1

: a letter mailed at a post office not having carrier service and addressed locally to someone who is to call for it at the same office

2

Canada : a letter mailed at or in the delivery area of the same post office from which it will be delivered

3

: an initial letter (as at the beginning of a chapter in a book) that extends downward to a depth of two or more text lines

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!