Noun countersign has 2 senses
  1. password, watchword, word, parole, countersign - a secret word or phrase known only to a restricted group; "he forgot the password"
    --1 is a kind of positive identification; secret, arcanum
  2. countersignature, countersign - a second confirming signature endorsing a document already signed
    --2 is a kind of signature
    Derived form: verb countersign1
,Verb countersign has 1 sense
  1. countersign - add one's signature to after another's to attest authenticity; "You must countersign on this line of the contract"
    --1 is one way to
    Derived forms: noun countersign2, noun countersignature1
    Sample sentences:
    Somebody ----s
    Somebody ----s something