A grenade is read as a volatile situation held in your hand, and tradition asks whether the pin is still in — whether the tension can still be contained.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.