Particle/ˈpɑːrtɪkl/ Definition 1 of 3Pro Tip 1/3Size Implication The word emphasizes the smallness or insignificance of something. The room was clean, without a particle of dust visible. Pro Tip 2/3Figurative Use Often used to suggest a tiny amount or lack of something non-physical. I don't have a particle of doubt in my mind. Pro Tip 3/3Negative Sentence Commonly found in negative contexts to stress absence. There wasn't a particle of hope left for the lost sailors.