Definitions

1. noun

The third-to-last word in a series of words or the second-to-last word in a verse or stanza.

“The antepenult word in the poem is a crucial element in the rhyme scheme.”

2. adjective

Situated or coming before the second-to-last word or element in a series or sequence.

“The antepenult note in the melody sets the tone for the rest of the piece.”