latch -
catch for fastening a door or gate; a bar that can be lowered or slid into a groove
catch the act of catching an object with the hands; "Mays made the catch with his back to the plate"; "he made a grab for the ball before it landed"; "Martin's snatch at the bridle failed and the horse raced away"; "the infielder's snap and throw was a single motion"
latch -
spring-loaded doorlock that can only be opened from the outside with a key