Definition of 'spineless'

Adjective

1. weak in willpower, courage or vitality
      Synonyms: namby-pamby gutless wishy-washy
2. lacking a backbone or spinal column; "worms are an example of invertebrate animals"
      Synonyms: invertebrate
      Antonyms: vertebrate
3. lacking spiny processes; "spineless fins"
      Antonyms: spinous spiny
4. lacking thorns
      Synonyms: thornless

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