  In light of current atmospheric neutrino oscillation data, we revisit the
invisible decay of the standard model Higgs boson and other pseudoscalar mesons
which can be enhanced because of large number of KK modes in models with right
handed singlet neutrinos in large extra dimensions. We find that the invisible
decay rate of Higgs can be as large as $H\to b \bar b $ decay rate only for a
very restricted region of parameter space. This parameter space is even further
restricted if one demands that the dimensionless neutrino Yukawa coupling $\l$
is O(1). We have also studied the scenarios where singlet neutrino propagate in
a sub-space, which lowers the string scale $M_{\ast}$ and keeps neutrino Yukawa
coupling O(1). We have also considered decays of other spin-0 mesons to $\nu
\bar\nu$ and found the rates to be too small for measurement.
