Adjective void has 2 senses
  1. null, void - lacking any legal or binding force; "null and void"
    Antonym: valid (indirect, via invalid)
  2. void - containing nothing; "the earth was without form, and void"
    Antonym:
    full (indirect, via empty)
,Noun voider has 4 senses
  1. invalidator, voider, nullifier - an official who can invalidate or nullify; "my bank check was voided and I wanted to know who the invalidator was"
    --1 is a kind of official, functionary
    Derived form: verb void1
  2. defecator, voider, shitter - a person who defecates
    --2 is a kind of person, individual, someone, somebody, mortal, human, soul
    Derived form: verb void4
  3. voider, gusset - a piece of chain mail covering a place unprotected by armor plate
    --3 is a kind of chain mail, ring mail, mail, chain armor, chain armour, ring armor, ring armour
    --3 is a part of
     body armor, body armour, suit of armor, suit of armour, coat of mail, cataphract
  4. clothes hamper, laundry basket, clothes basket, voider - a hamper that holds dirty clothes to be washed or wet clothes to be dried
    --4 is a kind of hamper
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