A solitary wave or single occurrence of a wave phenomenon.

एकल तरंग

English Usage: The ocean produced a single wave that crashed onto the shore.

Hindi Usage: समुद्र ने एकल तरंग उत्पन्न की जो तट पर आकर टकराई।

Referring to something that is alone or not accompanied by others.

अकेला

English Usage: She received a single wave of applause after her performance.

Hindi Usage: उसके प्रदर्शन के बाद उसे एकल प्रशंसा की लहर मिली।

To move one's hand back and forth in greeting or as a signal.

हाथ हिलाना

English Usage: He decided to single wave at his friend across the street.

Hindi Usage: उसने सड़क के पार अपने दोस्त को एकल हाथ हिलाने का फैसला किया।