Modulate/ˈmɑːdʒəleɪt/ Definition 1 of 4Pro Tip 1/2Voice Expression Modulate to express emotions or highlight particular words for storytelling or speeches. She modulated her voice to convey the character's excitement. Pro Tip 2/2Subtle Impact Small modulations can keep listeners engaged, preventing a monotonous tone. His voice modulation kept the audience attentive.