1. An annual celebration observed on October 31st, primarily in English-speaking countries, characterized by costume wearing, trick-or-treating, and themes of the supernatural and horror
Children dressed as ghosts and vampires for Halloween.
As crianças se vestiram como fantasmas e vampiros para o Dia das Bruxas.
2. The evening or holiday itself, with associated decorations, parties, and festivities
We're hosting a Halloween party next weekend.
Vamos fazer uma festa de Dia das Bruxas no fim de semana que vem.