What term represents a surface appearance that may not reflect reality?

The term that signifies a surface appearance that may not reflect reality is "facade." This word is often used to describe a deceptive outward appearance meant to conceal a less pleasant reality. In various contexts, such as architecture or personal behavior, a facade can present a beautiful or acceptable front while masking underlying issues or truths. For instance, someone may maintain a cheerful demeanor on the outside even when experiencing personal difficulties. This deceptive nature of a facade makes it particularly relevant when discussing how appearances can mislead others about the true state of affairs.