die Präsidentin
president
The female head of state of a republic.
Die Präsidentin hielt eine wichtige Rede an die Nation.
The president gave an important speech to the nation.

president
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president
The female head of state of a republic.
Die Präsidentin hielt eine wichtige Rede an die Nation.
The president gave an important speech to the nation.

To indicate whose president someone is, German usually uses the genitive. This construction is especially common in written language.
Sie ist die Präsidentin der Europäischen Kommission.
She is the president of the European Commission.
Common verbs used in connection with this office are "wählen" (to elect), "ernennen" (to appoint), "werden" (to become), and "sein" (to be).
Sie wurde mit großer Mehrheit zur Präsidentin gewählt.
She was elected president by a large majority.
You can tell from the context whether the head of state or the head of an organization is meant. Names of countries point to a head of state, while names of clubs, companies, or authorities refer to the head of an organization.
Die Präsidentin der Slowakei besucht nächste Woche Berlin.
The president of Slovakia is visiting Berlin next week.
president
'der Präsident' and 'die Präsidentin' refer to the same office or leadership role, but they differ according to the gender of the person. Use 'der Präsident' for a man. Use 'die Präsidentin' for a woman. Both words can mean the head of state or the leader of an organization. Learners may confuse them because the role is the same and only the form changes. So pay attention to the person: for a man, say 'der Präsident'; for a woman, say 'die Präsidentin'.

Die Präsidentin des Vereins spricht heute mit den Mitgliedern.
The president of the club is speaking with the members today.
Der Präsident unterschreibt das neue Gesetz.
The president signs the new law.