Which term best describes a situation that lacks any recent or historical comparisons?

The term that best describes a situation that lacks any recent or historical comparisons is "unprecedented." This word is used to indicate that something is unlike anything that has come before it, thus it cannot be compared to any past events or situations. When something is labeled as unprecedented, it implies a sense of novelty and original context that sets it apart from established precedents.

For example, in discussions about significant global events or trends, labeling an event as unprecedented suggests that it cannot be measured by previous standards, making it a crucial and unique occurrence in its own right. This helps to highlight the significance and impact of that situation, as it stands alone in its characteristics and implications.

The other terms do not convey the same meaning. "Trite" refers to something that is overused and lacking originality, "urbane" describes someone who is sophisticated and stylish, and "unheralded" pertains to something that is not acknowledged or celebrated, but it does not specifically imply a lack of comparison. Thus, "unprecedented" is the most fitting term for the situation described in the question.