From the editors of the Merriam-Webster dictionaries. My favorite comment:

Dropping out of the Top Twenty are, among others, metaphor and irony - a sure sign that fewer college English papers were written in July.

The fastest-rising word?

July’s peloton of words whizzes by, and up at the front of the pack is … peloton. Just as it did last summer, the Tour de France leads to a tour du dictionnaire, or at least a tour of the entry for peloton.

(It's "the main body of riders in a bicycle race," dates from 1951, and is related to the word platoon. Now we both know.)