A unit or single entity.

A term for a single item in a count.

एक

English Usage: "I bought one apple from the store."

Hindi Usage: "मैंने दुकान से एक सेब खरीदा।"

The ordinal number equivalent to the number seven.

Something that is the seventh in a sequence.

सातवां

English Usage: "The seventh book in the series is the most popular."

Hindi Usage: "श्रृंखला में सातवां पुस्तक सबसे लोकप्रिय है।"