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1. Oxford Dictionary

   free fall

   • IPA[ˌfriː ˈfɔːl]

   英式

   • n.
     downward movement under the force of gravity only；a rapid decline that cannot be stopped
   • v.
     move under the force of gravity only; fall rapidly

   • verb: free-fall, 3rd person present: free-falls, gerund or present participle: free-falling, past tense: free-fell, past participle: free-fell

   • noun: free fall

2. • 釋義

   n.

   名詞

   • 1. downward movement under the force of gravity only the path of a body in free fall
   • ▪ a rapid decline that cannot be stopped her career seemed about to go into free fall
   • ▪ the movement of a spacecraft in space without thrust from the engines.

   v.

   動詞

   • 1. move under the force of gravity only; fall rapidly I was free-falling and was quickly 1,000 ft below him