celebrar

Senses

1. 1.

   to celebrate

   to mark or observe a special occasion with festivities or ceremonies

2. 2.

   to perform, to officiate

   to conduct a religious ceremony or ritual (e.g., mass, wedding)

3. 3.

   to sign, to conclude

   to formalize or enter into an agreement or contract (formal/legal register)

Examples

• "Vamos celebrar o meu aniversário no sábado com uma festa em casa."

  We're going to celebrate my birthday on Saturday with a party at home.

• "O padre celebrou a missa de Natal na igreja lotada."

  The priest celebrated Christmas mass in the packed church.

• "As duas empresas celebraram um contrato de parceria estratégica."

  The two companies signed a strategic partnership contract.

Usage

Common collocations include "celebrar um acordo" (sign an agreement), "celebrar uma vitória" (celebrate a victory), and "celebrar a vida" (celebrate life). The legal/formal sense of signing contracts is less common in everyday speech but frequent in business and legal contexts. Note that for celebrations, "comemorar" is also widely used and often interchangeable.