Closed meaning : (physical) To remove a gap. (social) To finish, to terminate. To come or gather around; to enclose; to encompass; to confine. To have a vector sum of 0; that is, to form a closed polygon. Sealed, made inaccessible or impassable; not open. (of a store or business) Not operating or conducting trade. Not public. (of a set) Having an open complement. (of a set) Such that its image under the specified operation is contained in it. (of a formula) Lacking a free variable. (of a walk) Whose first and last vertices are the same, forming a closed loop. Formed by closing the mouth and nose passages completely, like the consonants /t/, /d/ and /p/. Having the sound cut off sharply by a following consonant, like the /ɪ/ in pin.