Figure of Speech
Polysyndeton
From Greek polysyndeton: many connections. The opposite of asyndeton. Biblical prose and poetry (especially the King James Bible) use polysyndeton for cumulative solemnity.
Definition
The use of multiple conjunctions in quick succession, slowing the rhythm and emphasising each element equally.
Example
'And the thunder rattled, and the lightning flashed, and the rain poured, and the wind screamed.'