Definition of first base noun from the Oxford Advanced American Dictionary

 

first base

 noun
noun
 
[singular]
 
jump to other results
  • (in baseball) the first of the bases that players must touch He didn't make it past first base.
  • Idioms
    not get to first base (with something/somebody)(informal)
     
    jump to other results
    to fail to make a successful start in a project, relationship, etc.; to fail to get through the first stage
    See the Oxford Advanced Learner's Dictionary entry: first base