  The near maximal value for the atmospheric neutrino mixing angle together
with the fact that the solar mixing angle satisfies the relation
$\sin^2\theta_\odot\simeq {1/3}$ is the basis for the so called tri-bimaximal
mixing (tbm) when $\theta_{13}=0$. In this note, we explore the possibility
that tri-bimaximal mixing is an indication of a softly broken higher leptonic
symmetry $S_3$, the permutation of three lepton families that embeds the
$\mu-\tau$ exchange symmetry of leptons.
