Mafi girma digiri kalma ce ta nahawu da ake amfani da ita don bayyana mafi girma ko mafi girman matakin kwatanta tsakanin abubuwa biyu ko fiye. A cikin harshen Ingilishi, mafi girman digiri ana samuwa ta hanyar ƙara "-est" zuwa ƙarshen sifa ko magana (misali, "mafi tsayi," "mafi sauri," "mafi wayo") ko ta amfani da kalmomin "mafi" ko " kalla" kafin sifa ko magana (misali, "mafi kyau
