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1. Having a firm basis in reality and being therefore important, meaningful, or considerable
   - substantial
    
2. Defining rights and duties as opposed to giving the rules by which rights and duties are established
   "substantive law"
   - essential
    
3. Being on topic and prompting thought
   - meaty

1. Any word or group of words functioning as a noun

Derived forms: substantives

See also: essential, meaningful, substantival

Type of: word

Antonym: adjective

Encyclopedia: Substantive