Definitions

1. noun

a firm or tight grip, a hold or clasp, especially of the hands or arms

“She grasped the rope with a firm clatch and began to climb.”

2. verb

to grasp or hold something firmly with the hands or arms

“The diver clatched the rock to break the surface tension.”

3. verb

to catch or seize something, especially quickly or unexpectedly

“The net clatched the ball just as it was about to roll away.”