From Longman Dictionary of Contemporary Englishshaving brushˈshaving brush noun [countable] 
DCBa brush used for spreading soap or shaving cream over your face when you shave
DCBa brush used for spreading soap or shaving cream over your face when you shaveExamples from the Corpus
shaving brush• She picked up the ivory-handled shaving brush which rested next to them, and felt the softness of its bristles against her face.• Another is the shaving brush, Penicillus. 