Entry 2 senses · 2 variants Webster, 1913 Slatting · Slat·ting · IPA n. 01 Slats, collectively. 1. Slats, collectively. 02 n. The violent shaking or flapping of anything hanging loose in the wind, as of a sail, when being hauled down. 1. The violent shaking or flapping of anything hanging loose in the wind, as of a sail, when being hauled down.