0 an animal sb keeps at home -- animal [ masculine ] de compagnie
1 to gently touch or pat an animal -- caresser
The kids can pet the farm animals. Les enfants peuvent caresser les animaux de ferme.
2 a tame animal etc, usually kept in the home -- animal familier, apprivoisé
(also adjective) a pet rabbit/goldfish.
She keeps a rabbit as a pet
3 (especially of children) a delightful or lovely person (used also as a term of affection) -- chou
4 favourite/favorite; greatest -- favori
What is your pet ambition/hate?
5 to stroke or caress (an animal) in a loving way -- caresser