1. Having a price that is set and does not change; not subject to negotiation or variation
The restaurant offers a fixed-price menu for dinner.
O restaurante oferece um menu de preço fixo para o jantar.
2. In commerce, referring to goods or services sold at an established, unchanging price
Fixed-price contracts are common in construction projects.
Contratos de preço fixo são comuns em projetos de construção.