noun
ampersand, and sign
A1
&: the ampersand, 'and sign'. Treated in German as a neuter noun (das &). Plural often written as the same symbol (&) in usage. Declension entries may show case forms with the symbol. Spoken as 'und-Zeichen' or 'Et-Zeichen'; mainly typographic/symbolic usage in names and logos.
Examples
Wegen des Symbols & auf dem Briefkopf entfernte die Firma das Zeichen, weil der neue Grafiker ein anderes Logo vorschlug.
Because of the symbol & on the letterhead, the company removed the sign since the new graphic designer proposed a different logo.
Im Firmennamen steht ein & zwischen den beiden Nachnamen.
There's an ampersand between the two surnames in the company name.
Schreibe das & nicht als 'und', sondern als Symbol.
Write '&' as the symbol, not as the word 'and'.
Details
Mnemonics
Think of '&' joining two words, like 'A & B'
ampersand sounds like 'ampersand' in English
Treat like 'das Zeichen' (neuter) — symbol names often use das
Notes
In German the ampersand is often read aloud as 'und' in normal speech; when naming the symbol, 'et-Zeichen' or 'Ampersand' may be used.