Meanings
lean, without fat (e.g. of meat or dairy)
meager, skinny, malnourished (of a person or animal, generally with a negative connotation)
poor in nutrients or yield in general (e.g. of land)
barren
„Ich hätte gern ein mageres Stück Fleisch.“
Examples
GermanEnglish
Tom ist mager, nicht wahr?Tom is thin, isn't he?
Tom ist sehr mager.Tom is very thin.