Sexy is a point of view.

For some, it's about persona. For others, it's about revelation. Still others believe it's a blend of both that leads to the ultimate seduction of the viewer.

Over the years, it's fascinating to note how its definition has dramatically altered, both, in terms of projection and perception.

Here's a look at Bollywood's Top 25 Sex Symbols from yesterday and today to witness the influence of changing times.

Fearless Nadia

It was her spectacular, uninhibited antics, and not just her golden hair and light eyes with which the Australia born Mary Ann Evans, Hindi cinema's first action heroine (Hunterwali) lit cinema screens during the 1930s.

At a time when demure was the norm, Fearless Nadia breathed life into her all-powerful moniker with a distinct individuality that made her, at once, effortlessly sexy and immensely desirable.

Image: Fearless Nadia

Blessed with an elfin figure and alluring dimples, the star of An Evening in Paris, Aradhana and Daag rocked her 'if you got it flaunt it' motto in stylish swimsuits and teasing butterfly knot blouses in movies and magazine covers.

Image: Sharmila Tagore

Her sizzling moves and face of a porcelain doll made for a winning combination in countless cabarets and seduction scenarios like Teesri Manzil, Caravan, Sholay, Don and Inkaar.

It's no surprise Helen ruled the roost (and our hearts) as the inimitable dancing queen of Hindi films.

Image: Helen

From secondary supporting roles to top-league leading lady, the rise of Mumtaz is nothing short of phenomenal.

Nor was her ability to make men go jelly-kneed with her belly button show and breezy attitude in Aaj kal tere mere (Brahmachari) to a no-holds barred glam diva in Apradh.

Image: Mumtaz

Before she graduated to making life hell for all the daughters-in-law on celluloid, Bindu oozed unbridled oomph in long-slit gowns and figure hugging costumes in films like Kati Patang and Zanjeer.

Image: Bindu