on nodding terms

Prepositional phrase

Having a relationship which is not close or fully developed (with someone).

Japanese Meaning

形式的な知り合い・挨拶程度の付き合い / あいさつ程度の、深くは関わっていない関係

何年も別の部署で働いていたため、廊下ですれ違うときは顔見知りに過ぎず、お互いに会釈するだけだ。

Sense（1）

Having a relationship which is not close or fully developed (with someone).

to be on nodding terms with one's neighbours