WordReference Random House Unabridged Dictionary of American English © 2025
shoul′der sea′son,
- a travel season between peak and off-peak seasons, esp. spring and fall, when fares tend to be relatively low. Also called shoulder.
- 1960–65
Collins Concise English Dictionary © HarperCollins Publishers::
'shoulder season' also found in these entries (note: many are not synonyms or translations):