Definition: The word "irregularly" is a preposition that means "in an irregular manner". For example, "She took a regular walk today." The meaning is that she took a more irregular or less planned walk than usual. It can also be used to describe something that has not been arranged in a precise way as if it were happening in an unpredictable or chaotic manner. For instance, "He was very irregualrly dressed for the party tonight." This means that he did not wear his usual clothes and was dressed in such an unorthodox manner.