This is the 81st most frequent Croatian word.
drugi
"Drugi" means "second" or "other" in English.
Here, 'drugi' means 'another one' referring to a second bicycle in addition to the first one.
Imam jedan bicikl, ali želim kupiti drugi.
I have one bicycle, but I want to buy another one.
In this context, 'drugi' is part of the phrase 'po drugi put', meaning 'for the second time' which refers to the ordinal number usage.
On je po drugi put osvojio turnir.
He won the tournament for the second time.
Here, 'druga' (feminine singular) indicates 'another' in the sense of 'different', referring to a person other than the one previously mentioned.