Not married or in a romantic relationship.

अविवाहित

English Usage: He has been single for a few years now.

Hindi Usage: वह पिछले कुछ वर्षों से अविवाहित है।

Denoting one only; unique.

एकल

English Usage: She is the single child in her family.

Hindi Usage: वह अपने परिवार में एकल बच्चा है।

A book or any single collection of written or printed sheets bound together.

पुस्तक

English Usage: She borrowed the latest volume of the series from the library.

Hindi Usage: उसने पुस्तकालय से श्रृंखला का नवीनतम पुस्तक उधार लिया।

The amount of space that a substance or object occupies.

आयतन

English Usage: The volume of the room is large enough to hold a party.

Hindi Usage: कमरे का आयतन एक पार्टी आयोजित करने के लिए पर्याप्त बड़ा है।