# spillover

> English word · Noun · frequency rank #52,640

## Definitions
1. That which overflows; the excess or side effect.
2. The spread of infectious disease between different species of animal and particularly to humans.

## Etymology
From spill + over.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/spillover