Bitter/ˈbɪtər/ Definition 1 of 4Pro Tip 1/3Negative Connotation The taste sense of 'bitter' often suggests an unpleasant or undesirable flavor. People tend to avoid the bitter part of an orange. Pro Tip 2/3Sensory Intensity Bitterness can be an intense taste that overpowers other flavors. The medicine's bitter taste made it hard to swallow. Pro Tip 3/3Contrast Sweetness 'Bitter' is often used to contrast with sweet flavors. Dark chocolate is known for its bitter notes compared to milk chocolate.