closed

(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.

“closed source  a closed committee”

(of a set) Having an open complement.

(of a set) Such that its image under the specified operation is contained in it.

“The set of integers is closed under addition: \forall x,y\in\mathbb{Z}\,x+y\in\mathbb{Z}.”

(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.