Dictionary

countersign

noun coun·ter·sign \-ˌsīn\

Definition of COUNTERSIGN

1
:  a signature attesting the authenticity of a document already signed by another
2
:  a sign given in reply to another; specifically :  a military secret signal that must be given by one wishing to pass a guard
countersign transitive verb
coun·ter·sig·na·ture \ˌkan-tər-ˈsig-nə-ˌchr, -chər, -ˌtyr, -ˌtr\ noun

Examples of COUNTERSIGN

  1. <the guard demanded the countersign>

First Known Use of COUNTERSIGN

1591

Related to COUNTERSIGN

COUNTERSIGN Defined for Kids

countersign

noun coun·ter·sign \ˈkan-tər-ˌsīn\

Definition of COUNTERSIGN for Kids

:  a secret signal that must be given by a person wishing to pass a guard :  password

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