the world > space > relative position > state or position of being parallel > parallel with the side [phrase] > abreast (3)
With prepositions, as in of a breast, in a breast, etc., forming adverbial phrases with the sense ‘side by side and facing or moving in the same…
With the cheek of one person touching or close to that of the other, side by side; (esp. in dancing) very closely, in an intimate or romantic manner.