1. To gather, collect, or assemble people or things quickly and efficiently
The manager had to round up speedily all the documents needed for the audit.
O gerente teve que reunir rapidamente todos os documentos necessários para a auditoria.
2. To gather livestock or people in a hurried manner
The cowboys rounded up speedily the cattle before the storm arrived.
Os vaqueiros reuniram rapidamente o gado antes da chegada da tempestade.