Meaning is airplane
'Vimaan'. ि represents the short 'i' vowel.
Oh okay so, ी and ई are long “ī, ee” sounds
Is this of Sanskrit origin? What would be the etymology, please?
Yes, it's borrowed from Sanskrit.
It is sometimes used as a general term for 'vehicle' but usually refers to a flying chariot in the epics. Here's the Wikipedia article with the etymology.