Definition of blind alley
: a fruitless or mistaken course or direction
First Known Use of blind alley
BLIND ALLEY Defined for English Language Learners
Definition of blind alley for English Language Learners
: a narrow path between two buildings that can only be entered at one end
Seen and Heard
What made you want to look up blind alley? Please tell us where you read or heard it (including the quote, if possible).