  We present optical and ultraviolet photometry, and low resolution optical
spectroscopy of the broad-line type Ic supernova SN 2014ad in the galaxy PGC
37625 (Mrk 1309), covering the evolution of the supernova during $-$5 to +87 d
with respect to the date of maximum in $B$-band. A late phase spectrum obtained
at +340 d is also presented. With an absolute $V$ band magnitude at peak of
$M_{V}$ = $-$18.86 $\pm$ 0.23 mag, SN 2014ad is fainter than Gamma Ray Burst
(GRB) associated supernovae, and brighter than most of the normal and
broad-line type Ic supernovae without an associated GRB. The spectral evolution
indicates the expansion velocity of the ejecta, as measured using the Si\,{\sc
ii} line, to be as high as $\sim$ 33500 km\,s$^{-1}$ around maximum, while
during the post-maximum phase it settles down at $\sim$ 15000 km\,s$^{-1}$. The
expansion velocity of SN 2014ad is higher than all other well observed
broad-line type Ic supernovae except the GRB associated SN 2010bh. The
explosion parameters, determined by applying the Arnett's analytical light
curve model to the observed bolometric light curve, indicate that it was an
energetic explosion with a kinetic energy of $\sim$ (1 $\pm$
0.3)$\times$10$^{52}$ ergs, a total ejected mass of $\sim$ (3.3 $\pm$ 0.8)
M$_\odot$, and $\sim$ 0.24 M$_\odot$ of $^{56}$Ni was synthesized in the
explosion. The metallicity of the host galaxy near the supernova region is
estimated to be $\sim$ 0.5 Z$_\odot$.
