This is the 208th most frequent Hindi word.
लहर
Wave
In this sentence, "लहर" refers to the physical waves of water in the sea.
समुद्र की लहरें किनारे तक आकर टूट जाती हैं।
The sea waves come to the shore and break.
Here, "लहर" is used metaphorically to denote a figurative wave or surge of emotion caused by singing.
उसकी गाने की लहर सबके दिलों को छू गई।
Her wave of singing touched everyone's hearts.
In this context, "लहर" signifies a movement or trend, metaphorically spreading like a wave.