US:USA pronunciation: IPA and respellingUSA pronuncation: IPA/ˈpæsɚˈbaɪ, -ˌbaɪ/ ,USA pronunciation: respelling(pasər bī, -bī′, päsər-)

Inflections of 'passerby' (nnoun: Refers to person, place, thing, quality, etc.): nplplural noun: Noun always used in plural form--for example, "jeans," "scissors.": passersby (US)

WordReference Random House Learner's Dictionary of American English © 2020
pass•er•by or  pass•er-by /ˈpæsɚˈbaɪ, -ˌbaɪ/USA pronunciation   n.[countable]pl.  pass•ers•by or pass•ers-by 
    /ˈpæsɚzˈbaɪ, -ˌbaɪ/.USA pronunciation  
  1. a person passing by:A group of passers-by formed around the accident victim.
See -pass-1.
WordReference Random House Unabridged Dictionary of American English © 2020
pass•er•by  (pasər bī, -bī′, päsər-),USA pronunciation n., pl.  pass•ers•by 
    (pasər bī, -bī′, päsər-),USA pronunciation 
  1. a person passing by.
Also,  passer-by. 
  • pass by + -er1, with postposing of the particle 1560–70

Collins Concise English Dictionary © HarperCollins Publishers::
passer-by n ( pl passers-by)
  1. a person that is passing or going by, esp on foot
'passerby' also found in these entries (note: many are not synonyms or translations):
Report an inappropriate ad.