"Perhaps" is an adverb used to express uncertainty or possibility. It indicates that something might happen or be true, but it is not guaranteed. For example, saying, "Perhaps it will rain tomorrow" suggests that rain is a possibility, but it is not certain. In conversation, "perhaps" can soften statements, making them less direct. For instance, instead of saying, "You should go," one might say, "Perhaps you should go." This approach can make suggestions feel more polite and open-ended, allowing for discussion and consideration of different viewpoints.