This is the 2721st most frequent Russian word.
глеб
"Глеб" is a Russian masculine given name.
The word "Глеб" is used as a personal name, acting as the subject of the sentence, referring to an individual.
Глеб надел новый костюм на вечеринку.
Gleb wore a new suit to the party.
Here, "Глеба" is the accusative case of the name "Глеб," indicating that the action of meeting is directed towards Gleb.
Я встретил Глеба утром в парке.
I met Gleb in the park this morning.
In this sentence, "Глебом" is the instrumental case of "Глеб," used to indicate accompaniment.