Kalmar "Newtonian" yawanci tana nufin abubuwan da suka shafi ko daidai da ƙa'idodin Sir Isaac Newton, shahararren masanin kimiyyar lissafi da Ingilishi. A fannin ilimin kimiyyar lissafi, kalmar “Newtonian” ta kan bayyana al’amuran da dokokin motsi na Newton za su iya bayyanawa da kuma ka’idarsa ta gravitation ta duniya, wadda ke bayyana halayen abubuwa a cikin motsi da kuma jan hankali a tsakaninsu. A cikin ilmin lissafi, "Newtonian" na iya nufin hanyar Newton, algorithm na lambobi don gano tushen daidaito. Hakanan za'a iya amfani da kalmar "Newtonian" gabaɗaya don bayyana ra'ayoyi, ra'ayoyi, ko ra'ayoyin da suka dogara akan ko tasirin aikin Isaac Newton.