To make something known, proclaim it, or communicate it officially. This expression is formal or slightly old-fashioned.
example
Der Firmenchef wird seine Entscheidung morgen der Belegschaft kund tun.
The company head will announce his decision to the workforce tomorrow.
Usage tips
Fixed expression
The adjective 'kund' (known) is used today almost only in the fixed expression 'kund tun' (to announce / make known). It means to officially make something known or proclaim it. On its own, the word is very outdated.
EXAMPLE
Der König ließ seinen Entschluss im ganzen Reich kund tun.
The king had his decision proclaimed throughout the entire realm.
Sentence structure
The expression 'kund tun' (to announce / make known) is often used with a dative object and an accusative object. The structure is: someone (subject) makes something (accusative) known to someone (dative).
EXAMPLE
Die Gewinnerin tat der Presse ihre Freude über den Sieg kund.
The winner announced her joy about the victory to the press.
Register
The word 'kund' (known) and the expression 'kund tun' (to announce / make known) belong to an elevated or formal style of language. In everyday colloquial speech, they sound very stilted or outdated.
EXAMPLE
In der offiziellen Mitteilung wurde der Rücktritt des Ministers kundgetan.
The minister's resignation was announced in the official statement.
Compare with
synonym · confusable
kund vs bekannt
known
'bekannt' and 'kund' can both express that something is known or communicated. In modern German, 'bekannt' is the normal word and fits almost all everyday situations. 'kund', on the other hand, is elevated or outdated and today appears mainly in fixed expressions such as 'kundtun' (to announce / make known). The words can be confused because 'kund' is close in meaning to 'bekannt'. In practice: if you want to speak or write normally, usually use 'bekannt'. 'kund' is more appropriate in formal, solemn, or older language.
kund
Der Bürgermeister tat seine Entscheidung vor allen Gästen kund.
The mayor announced his decision in front of all the guests.
bekannt
Der Termin für die Prüfung ist seit Montag bekannt.
The date for the exam has been known since Monday.