From Japanese-English FreeDict Dictionary ver. 0.1:
[ichi1] [news1] [nf03] 急 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, [ichi1] [news1] [nf03] きゅう /kʲˈɯᵝɯᵝ/
1. (adjectival nouns or quasi-adjectives (keiyodoshi))
urgent, sudden, abrupt
2. sharp, steep, precipitous
3. rapid, swift, fast
4. (noun (common) (futsuumeishi))
emergency, crisis
5. hurrying, haste
6. 序破急(in gagaku or noh) end of a song