call on
US /kɔːl ɑːn/
UK /kɔːl ɑːn/

1.
chamar, convocar
to ask someone in a formal way to do something
:
•
The teacher decided to call on a student to answer the question.
O professor decidiu chamar um aluno para responder à pergunta.
•
The president will call on the nation to unite during this crisis.
O presidente convocará a nação para se unir durante esta crise.
2.
visitar, fazer uma visita a
to pay a brief visit to someone
:
•
I decided to call on my grandmother after work.
Decidi visitar minha avó depois do trabalho.
•
We should call on our neighbors to see if they need anything.
Deveríamos visitar nossos vizinhos para ver se eles precisam de algo.