1.
entry, entering, trespassing
The act of entering a restricted or prohibited area. Most commonly seen in prohibition signs and warnings.
立ち入り禁止。
No entry. / Keep out.
工事中のため、立ち入りはご遠慮ください。
Please refrain from entering, as construction is underway.
許可なく敷地に立ち入ると、法律で罰せられることがある。
Entering the premises without permission may be punishable by law.
Here 立ち入る is used as a verb rather than the noun form.
立ち入り means entering an area, especially one that is restricted. Most commonly encountered as part of prohibition signs.
VERB FORM:
The verb is 立ち入る (to enter, to trespass). This noun form is the masu-stem nominalization.
COMMON COLLOCATIONS:
- 立ち入り禁止: no entry, keep out (the most common phrase)
- 立ち入り検査: on-site inspection (by authorities)
- 立ち入り調査: on-site investigation
- 無断立ち入り: unauthorized entry
- 立ち入り制限: entry restrictions
USAGE:
Almost always used in formal, official, or legal contexts. You will see 立ち入り禁止 on signs at construction sites, private property, and restricted areas. In everyday conversation, 入る is the normal word for entering.