Seem/siːm/ Definition 1 of 4Pro Tip 1/3Impression Sensing Seem is used when you sense something but lack confirmation. The sky seems cloudy, but I'm not sure if it'll rain. Pro Tip 2/3Not Certain 'Seem' implies uncertainty, it doesn't confirm the fact. You seem tired, but I might be wrong. Pro Tip 3/3Observation Based Use 'seem' when making judgments based on observations. This task seems difficult, given our current resources.