English definition of “remain”
› [I] to continue to exist when everything or everyone else has gone: Only a few hundred of these animals remain today.
remain calm/open, etc; remain a secret/mystery/prisoner, etc › to continue to be in the same state: Despite the chaos around him, he remained calm. The exact date of the wedding remains a secret.
remain at/in/with, etc formal › to stay in the same place: She will remain at her mother's until I return.