What term is used to describe something lacking interest or significance?

The term "insipid" is used to describe something that is lacking in flavor, interest, or significance. It conveys a sense of dullness or lack of stimulation, making it analogous to something that is bland or unexciting. When referring to a person, event, or experience as insipid, it implies that there is nothing noteworthy or engaging about it, leaving one feeling uninspired or disinterested.

This word effectively captures the essence of something that fails to evoke interest, making it the most appropriate choice for the definition provided in the question. The term "insipid" is often used in both culinary contexts, where it describes food that lacks taste, and in more general contexts, indicating a lack of liveliness or appeal.