noun
grandpa, grandfather
A1
Opa means 'grandpa' or 'grandfather', an informal term for Großvater. It's a masculine noun (der Opa). Plural commonly Opas (not an umlaut plural). Declension follows regular weak patterns; use der/des/dem and die/den for plural. Familiar register, often used in spoken German.
Examples
Der Großvater, also Opa, ist sehr freundlich.
The grandfather, that is grandpa, is very friendly.
Mein Opa erzählt viele Geschichten.
My grandpa tells many stories.
Mein Opa geht jeden Tag mit seinem Hund spazieren.
My grandpa takes his dog for a walk every day.
Details
Mnemonics
An old man with a cap and a pipe, captioned 'Opa'
der — imagine a grandfather (male) labeled 'der Opa' telling stories