1. Actions or conduct that are typical, ordinary, or frequently observed in a given group or society
In many cultures, shaking hands is common behavior when greeting someone.
Em muitas culturas, apertar a mão é um comportamento comum ao cumprimentar alguém.
2. Habitual or customary conduct that is widely accepted and practiced
Checking your phone first thing in the morning has become common behavior for most people.
Verificar o telefone logo pela manhã tornou-se um comportamento comum para a maioria das pessoas.