The title compound, C19H17NO, has an E conformation about the N=C bond. The mol­ecule is relatively planar, with the benzene ring and naphthalene ring plane being inclined to one another by 4.28 (10)°. There is an intra­molecular O-H...N hydrogen bond generating an S(6) ring motif. In the crystal, mol­ecules are linked via C-H...O hydrogen bonds, forming chains propagating along [100]. Within the chains there are [pi]-[pi] inter­actions involving the benzene ring and the naphthalene ring system of an adjacent mol­ecule [inter-centroid distance = 3.6405 (14) Å].