1. Third person plural present tense of 'ignorar' with reflexive pronoun 'se', indicating mutual ignorance or lack of awareness between two or more parties
They ignore each other completely in the workplace.
Eles ignoram-se completamente no local de trabalho.
2. They pretend not to know or acknowledge one another
The two rivals ignoram-se when they meet in public.
Os dois rivais ignoram-se quando se encontram em público.