1. A person who supports or agrees with a cause, movement, or political party without being a formal member
The organization has many sympathizers who donate money but are not official members.
A organização tem muitos simpatizantes que doam dinheiro mas não são membros oficiais.
2. A person who feels sympathy or compassion toward someone or something
She is a sympathizer with the environmental movement.
Ela é uma simpatizante do movimento ambiental.