I-Ageism isho ukucwasa nokucwasa okusekelwe eminyakeni yomuntu, okuthinta kokubili abantu abasha nabadala. Laqanjwa uRobert N. Butler ngo-1969, leli gama lihlanganisa izimo zengqondo ezingezinhle ngokuguga, imikhuba yokucwasa abantu abadala asebekhulile, nokucindezelwa kwabantu abasha yizizukulwane ezindala. I-Ageism ibonakala ngezindlela ezihlukahlukene, okuhlanganisa imibono engaguquki ehlanganisa amakhono nezithakazelo ngokusekelwe eminyakeni yobudala, ukucwasa okuholela ekwedelweni noma ekuhawukeleni, kanye nokubandlulula okuholela ezenzweni eziyingozi kubantu ngabanye ngenxa yobudala babo.