1. I-adjective (keiyoushi)

   noisy; loud

   Usually written using kana alone

   隣の部屋がうるさいのです。

2. annoying; troublesome; tiresome; persistent; importunate

   Usually written using kana alone

3. fussy; finicky; picky; particular; nagging; fastidious; bossy

   Usually written using kana alone

4. Interjection (kandoushi)

   shut up; be quiet

   Usually written using kana alone

Also written 五月蝿い【うるさい】urusai、五月蠅い【うるさい】urusai