Notch may refer to:Notch (engineering), an indentation or slit in a material Nock (arrow), notch in the rearmost end of an arrow NOTCH (magazine), an Indian entertainment and lifestyle magazine Notch, Missouri, a community in the United States Notch signalling pathway, a cell signalling system present in most multicellular organisms Notch proteins, a family of transmembrane proteins Notch filter, a band-stop filter with a narrow stopband Notch test, also known as Charpy impact test Lion Notch, a male lion featured in the nature documentary series Big Cat Diary Notch display, an electronic screen with a cutout in it A type of col in geomorphology