Fickle/ˈfɪkl/ Definition 1 of 1Pro Tip 1/3Emotional Impact Fickle often implies negative judgment, used for criticizing inconsistency or unreliability. His fickle nature made it hard to trust him. Pro Tip 2/3Not Always Negative Sometimes 'fickle' describes positive flexibility, adapting easily to change. Her fickle tastes make her an adventurous diner. Pro Tip 3/3Human vs Non-Human Fickle often refers to people, but may also describe the weather, luck, or inanimate objects. The fickle winds made it tough to sail.