1. Amounts or volumes that are predetermined, established, or not subject to change
The recipe requires fixed quantities of flour and sugar.
A receita requer quantidades fixas de farinha e açúcar.
2. In mathematics and science, specific numerical amounts that remain constant
The experiment uses fixed quantities of each chemical compound.
O experimento usa quantidades fixas de cada composto químico.
3. In commerce, predetermined amounts of goods or materials ordered regularly
The supplier delivers fixed quantities of inventory every week.
O fornecedor entrega quantidades fixas de estoque toda semana.