What is the meaning of flour in hindi?

The most common word is Aata (आटा). This nearly always means whole wheat flour. It's the browner flour you use for making flatbreads like roti and chapati.

But it can be a bit confusing, mate. In India, they have specific words for different types of flour.

The white, all-purpose flour, like what you'd use for cakes, is called Maida (मैदा). It's very different from Aata.

And then there's Besan (बेसन), which is gram flour. That's made from chickpeas. It's used for heaps of snacks.

So yeah, Aata is the main one. But it really depends on the recipe you are using. Hope that helps you out.