seilinga is the feminine singular definite of seiling.

seilingN

Kven

seilaaminenN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:717Edit on GitHub Suggest

borjjastusN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:232897Edit on GitHub Suggest

Case	Sg	Pl
Indef	seiling	seilinger
Def	seilingen / seilinga	seilingene