1. An initial attempt to find or locate something
Our first search of the house didn't turn up the missing keys.
Nossa primeira busca pela casa não encontrou as chaves perdidas.
2. In computing, a search algorithm that explores nodes in a graph level by level (breadth-first search) or depth by depth (depth-first search)
The programmer implemented a first search algorithm to traverse the tree structure.
O programador implementou um algoritmo de primeira busca para percorrer a estrutura de árvore.