adjective
traditional, conventional
B1
Traditionell means traditional or conventional. It’s a gradable adjective with comparative traditioneller and superlative am traditionellsten. Opposed to modern or innovativ. Use attributively or predicatively like ein traditionelles Fest or Das ist traditionell. No irregular forms beyond standard adjective endings.
Examples
Er bevorzugt einen eher konventionellen, also traditionelleren Stil bei der Einrichtung.
He prefers a more conventional, i.e., more traditional style in the decor.
Wir essen an Weihnachten traditionelle, traditionell zubereitete Gerichte.
At Christmas we eat traditional dishes prepared in the traditional way.
Das Gericht wurde traditionell zubereitet, weil die Köchin das alte Rezept liebte.
The dish was prepared traditionally because the cook loved the old recipe.
Details
Mnemonics
Picture a traditional costume or dish labeled 'traditionell' to link form and meaning.
Sounds like English 'traditional' — same root.
Notes
The adjective is gradable: 'traditionell, traditioneller, am traditionellsten'. It can describe customs, styles, food, and more.