one place; one spot; one location
Counts a single physical or abstract location. Can also mean 'the same place' when context implies unity.
書類に一箇所だけ間違いがあった。
There was a mistake in just one place in the document.
会議は一箇所に集まって行う。
We will hold the meeting gathered in one place.
一か所 is the everyday way to say 'one place' or 'a single location,' whereas 一堂 is formal and mainly used in fixed gathering expressions.
各地 means many scattered places, while 一箇所 means just a single, specific place.
Standard kanji spelling using 箇.
Common variant using katakana カ.
Common variant using small ヶ.
Variant using numeral １.
Variant using numeral １ and katakana カ.
Variant using numeral １ and small ヶ.
Compound of 一 (one) + 箇所 (counter for places). The counter 箇所 (かしょ) is itself a combination of 箇 (counter for items) and 所 (place).