Definition:
“A group of words that is written out as a sentence but that lacks a subject or verb.”
Informal definition:
“Fragments are incomplete sentences. Usually, fragments are pieces of sentences that have become disconnected from the main clause.”
Etymology:
“From Latin fragmentum "a fragment, remnant," literally "a piece broken off," from base of frangere "to break.”
Harper, Douglas. "Etymology of fragment." Online Etymology Dictionary,
https://www.etymonline.com/word/fragment. Accessed 6 September, 2022.