noun
lower part; bottom section; substructure
Refers to the lower portion of a physical object, a page or screen, a diagram, a structure, and similar things. In compounds such as 下部構造 it can mean the substructure or underlying lower structure.
画面の下部に検索ボタンがあります。
There is a search button at the bottom of the screen.
建物の下部が浸水した。
The lower part of the building was flooded.
noun
subordinate office; lower-level organization
Administrative or organizational use, most naturally seen in compounds such as 下部組織 and 下部機関, meaning a body lower in a hierarchy.
この団体は全国に下部組織を持っている。
This organization has subordinate branches across the country.
noun
subordinate; loyal servant; faithful servant
Rare or old-fashioned use for a person in a low or serving position. Modern Japanese normally uses other words such as 部下 or しもべ depending on the context.
古い語義では、「下部」が主人に仕える者を指すことがある。
In an older sense, 下部 (kabu) can refer to someone who serves a master.