Definition of portion

• something determined in relation to something that includes it; "he wanted to feel a part of something bigger than himself"; "I read a portion of the manuscript"; "the smaller component is hard to reach"
• something less than the whole of a human artifact; "the rear part of the house"; "glue the two parts together"
• the allotment of some amount by dividing something; "death gets more than its share of attention from theologians"