third base in baseball refers to the base that a runner must reach after passing second base before scoring.

third base as a metaphor for an advanced stage in a romantic relationship.

रोमांटिक रिश्ते में उन्नत चरण

English Usage: They feel like they're at third base in their relationship after a weekend getaway.

Hindi Usage: वे सप्ताहांत की छुट्टी के बाद अपने रिश्ते में तीसरे बेस पर होने जैसा महसूस करते हैं।