Undefines symbols previously defined with  DEFINE.   UNDEFINE  is
     equivalent to DELETE.

 Format:

     UNDEFINE[/qualifier] symbol-name[,symbol-name...]

Additional information available:

ExampleParametersQualifiers

     DBG> DEFINE A = MAIN\VAR1
     DBG> EXAM A
     MAIN\VAR1: 5
     DBG> UNDEFINE A
     DBG> EXAM A
     %DEBUG-W-NOSYMBOL, "A" is not in the symbol table

symbol-name

     symbol-name can be any name that was previously defined with  the
     DEFINE command

Additional information available:

/ALL/LOCAL/KEY

     Undefine all defined symbols

     Undefine symbols defined with DEFINE/LOCAL

     Undefine the key  denoted  by  key-name.   The  table  of  keypad
     definitions  is  stored separately from other DEFINEd symbols, so
     keys must be undefined with UNDEFINE/KEY.

Format:  UNDEFINE/KEY key-name