/sil"euh/ , n.
1. Modern, Scilla . a rock in the Strait of Messina off the S coast of Italy.
2. Class. Myth. a sea nymph who was transformed into a sea monster: later identified with the rock Scylla. Cf. Charybdis (def. 2).
3. between Scylla and Charybdis , between two equally perilous alternatives, neither of which can be passed without encountering and probably falling victim to the other.