A device for fastening or checking the motion of something, esp. a latch or other mechanism for fastening a door, window, etc.; (sometimes spec.)…

A catch, holdfast, bolt, etc., that fastens something by falling or springing into position. Now rare.

transferred. A spring catch or fastening. Obsolete.

a hook designed to engage with or catch onto another hook, a part of a mechanism, etc.

A spring-catch, clasp, or fastening, or one closing with a snapping or clicking sound.

any of various types of lock that make use of a catch or bolt.

Used (frequently attributive) of a clip or other fastening having a strong closure.