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I think the meaning is more appetizing than the word. Sillage (n) the scent that lingers in the air, the trail left in the water, the impression made in space after something or someone has been and gone ; the trace of someone's perfume
And that's how this word ended up becoming my favourite, I was searching for something else on the dictionary and this word came along which gave meaning to a lot of things that happen to me whenever I'm not searching consciously for an answer.