Pronunciation: [ɹˈʌn ɐbɹˈɛst] (IPA) 
The phrase "run abreast" means to run or move side by side with another person, vehicle, or animal. It is spelled as /rʌn əˈbrɛst/ in IPA phonetic transcription. The first syllable, "run," is pronounced with a short "uh" sound, while the second syllable, "a," is pronounced with a short "uh" sound as well. The stress falls on the second syllable, "breast," which is pronounced with a short "e" sound followed by a rolled "r" sound.
The phrase "run abreast" is an idiomatic expression referring to the act of running alongside or parallel to someone or something. It can be used both literally and figuratively.
In its literal sense, "run abreast" is often used to describe a group of individuals or objects running side by side in a straight line or in a synchronized manner. This is commonly observed in sports such as rowing, where rowers in a boat move together in a coordinated motion. It implies a sense of unity, teamwork, and coordination among the participants.
Figuratively, "run abreast" is used to describe the act of progressing or advancing at the same pace with someone else or keeping up with a particular development or trend. It represents the idea of maintaining equality or staying on par with others in terms of progress, knowledge, or achievement. For example, in a competitive business environment, it may be said that different companies or individuals are running abreast in terms of innovation or market share.
Overall, "run abreast" conveys the idea of staying parallel or synchronizing with others, either literally or figuratively. It implies cooperation, coordination, and maintaining a similar pace or level of progress with those around you.
The term "run abreast" is derived from the word "run", which has Old English origins and is derived from the Proto-Germanic word "rinnan". It originally meant "to flow" or "to move swiftly".
The word "abreast" also has Old English roots, derived from the phrase "on brest", which meant "side by side" or "breast to breast". "On brest" eventually evolved into "abrest" and then into "abreast".
When the two words, "run" and "abreast", are combined, "run abreast" is formed. It means to run or move alongside or parallel to each other, staying side by side or maintaining equal distance. This expression is often used metaphorically to describe the parallel or simultaneous progress of multiple individuals or groups.
