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Dictionary definition for:
1. (s) be difficult to detect or grasp by the mind; "his whole attitude had undergone a subtle change" "a subtle difference" "that elusive thing the soul"
2. (s) faint and difficult to analyze; "subtle aromas"
3. (s) able to make fine distinctions; "a subtle mind"
4. (s) working or spreading in a hidden and usually injurious way; "glaucoma is an insidious disease" "a subtle poison"
WordNet 2.1 Copyright Princeton University. All rights reserved.