名詞 dogfight:

1. a fiercely disputed contest
2. disorderly fighting
   同義詞：hassle, scuffle, tussle, rough-and-tumble
3. an aerial engagement between fighter planes
4. a violent fight between dogs (sometimes organized illegally for entertainment and gambling)

動詞 dogfight:

1. arrange for an illegal dogfight
2. engage in an aerial battle with another fighter plane

dog.fight

n.（名詞）

A violent fight between or as if between dogs.
大混戰(zhàn)：狗打架，象狗一般的打架
An illegal, organized fight betwen dogs, arranged for spectator entertainment and betting.
斗狗：用以聚眾娛樂和賭博的非法組織的斗狗
An aerial battle between fighter planes.
空戰(zhàn)：戰(zhàn)斗機的空中戰(zhàn)斗

【引伸】
dog.fight.er
n.（名詞）