What does "outlandish" mean in a descriptive context?

The term "outlandish" is used to describe something that is conspicuously or grossly unconventional or unusual. It often refers to ideas, behavior, or styles that are considered eccentric or bizarre, standing out significantly from what is typical or expected. For example, an outlandish outfit might include bright colors, extravagant designs, or elements that are far from the mainstream fashion. The essence of the word conveys a sense of being strikingly different, which aligns perfectly with the definition of being unconventional.

In contrast to the other options, which emphasize commonness, secrecy, or subtlety, "outlandish" inherently carries a boldness and a disregard for the ordinary, making it clear that the choice indicating unconventionality is the most appropriate.