WordNet

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"; "the animal constituent of plankton" (同)portion, component part, component, constituent
something less than the whole of a human artifact; "the rear part of the house"; "glue the two parts together" (同)portion
a line of scalp that can be seen when sections of hair are combed in opposite directions; "his part was right in the middle" (同)parting
a portion of a natural object; "they analyzed the river into three parts"; "he needed a piece of granite" (同)piece
one of the portions into which something is regarded as divided and which together constitute a whole; "the written part of the exam"; "the finance section of the company"; "the BBCs engineering division" (同)section, division
the melody carried by a particular voice or instrument in polyphonic music; "he tried to sing the tenor part" (同)voice
that which concerns a person with regard to a particular role or situation; "it requires vigilance on our part"; "they resisted every effort on his part"

PrepTutorEJDIC

〈C〉(全体を構成する)『部分』 / 〈U〉《しばしばa~》(…の)『一部』,『一部分』《+『of』+『名』》 / 〈C〉《割合》…分の1,(比率の)1 / 〈C〉(機械,器具などの)部品 / 〈C〉(仕事などの)『役目』,分担;関与 / 〈U〉(対立・契約などの)一方の側 / 〈C〉《おもに米》(頭髪の)分け目(《おもに英》parting) / 〈C〉《複数形で》地域,地方 / 〈C〉(演劇・影画・オペラなどの)『役』,役割り(role);(役の)せりふ / 〈C〉声部,音部,パート;パート譜 / (複数形で)才能,資質 / …‘を'二つに(部分に)分ける;(各部分に)‘を'分ける)《+『名』+『into』(『in』)+『名』》 / (…から)…を引き離す,分ける《+『名』+『from』+『名』》 / (二つ以上の部分に)『分かれる』 / 『別れる』 / (物を)手放す,処分する《+『with』+『名』〈物〉》 / 一部分は,部分的に,幾分