1.
upper part, top section
The upper portion or top area of something. Used in both everyday descriptions and technical contexts to indicate the part that is higher in position.
Usage: 上部 refers to the physical upper portion of an object, structure, or space. It is somewhat formal and is common in written descriptions, instructions, and technical texts.
Common collocations
Note: Do not confuse with 丈夫 (sturdy, durable), which has the same reading but a completely different meaning.
Pair: The opposite is 下部 (lower part).