Titter/ˈtɪtər/ Definition 1 of 2Pro Tip 1/3Subtle Humor Use 'titter' when the humor is delicate or when you're unsure how to react. She tittered at the clever wordplay, not fully understanding the pun. Pro Tip 2/3Awkward Situations 'Titter' often follows an uneasy or embarrassing moment in social settings. After his voice cracked, the room filled with a few titters. Pro Tip 3/3Low Volume A 'titter' is usually quiet, not intended to draw much attention. The subtle joke made her titter under her breath.