treffa is the neuter plural definite of treff.

treffN

Kven

kohtaaminenN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:16594Edit on GitHub Suggest

deaivvadeapmiN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:55721Edit on GitHub Suggest

Case	Sg	Pl
Indef	treff	treff
Def	treffet	treffa