This is the 97th most frequent Czech word.
prezident
President.
Here, 'prezident' is used to refer to a country's highest official, namely the head of state.
Prezident České republiky vyhlásil nové volby.
The President of the Czech Republic has announced new elections.
Here, 'prezident' is employed to signify a leader or chairman of a smaller organization or group, like a club.
Prezident naší šachové klubu uspořádal nový turnaj.
The president of our chess club organized a new tournament.
In this context, 'prezident' denotes the leader or chief executive officer of an organization, specifically a company.