外部|がいぶgaibu[1]atamadaka (head-high)

1. no-adjectiveoutside (e.g. of a building); exterior
2. no-adjectiveoutside (of a group, company, etc.); outside world
   田舎いなかの人々ひとびとは外部がいぶの人ひとに対たいして昔むかしから疑い深うたがいぶかい。↗

   Country people are traditionally suspicious of strangers.

   秘密ひみつが外部がいぶに漏もれた。↗

   The secret leaked out.

• Synonym外側そとがわNeutralThe everyday word for the outer side or layer of an object; 「外部」 can also mean outside an organization, which 「外側」 generally cannot.
• Synonym外そとNeutralAlso carries the sense of ignoring something, as in 「勉強をよそに遊ぶ」; 「外部」 only denotes the outside of a space or group and has no such use.
• SynonymアウトサイドNeutralA loanword for the outer side, often heard for the outside corner in ball sports and the like; everyday talk of the outside uses 「外側」 or 「外部」.
• RelatedよそNeutralCovers another place and other people, with a feeling of distance, as in 「よその人」; 「外部」 is more objective, mainly for outside a building or organization.
• RelatedほかNeutralRefers broadly to other people or things and to elsewhere, with no inside–outside split; 「外部」 specifically means outside a given scope.
• Related外の方NeutralExplanatory wording for the side facing out or the outside; more casual. 「外部」 is a noun that can also cover what lies outside an organization or group.
• Antonym内部ないぶNeutralThe antonym: the inside of a building or group, as in 「内部の事情」 versus 「外部の人」.

Use 「外部」 for the outside of a building or, especially, an organization, as in 「外部委託」. For the outer side of an object say 「外側」; for elsewhere or outsiders say 「よそ」. The opposite is 「内部」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 仕切しきりの外そとの方ほう。
2. 集団しゅうだんの外そと。
3. ある位相いそう空間くうかんと、その位相いそう空間くうかんのある部分ぶぶん集合しゅうごうを考かんがえるとき、その部分ぶぶん集合しゅうごうの全すべての外そと点てんから成なる集合しゅうごう。