Breakdown of A lixeira está cheia de lixo, então vou levá-la para fora.
Questions & Answers about A lixeira está cheia de lixo, então vou levá-la para fora.
Portuguese usually uses the definite article more often than English does. So a lixeira is the normal way to say the trash can.
In English, you might sometimes drop the in certain contexts, but in Portuguese, a lixeira sounds more natural here than just lixeira.
Because lixeira is feminine, the article is a, not o.