pas·ser·by also pas·ser-by 
(păsər-bī′, -bī)
(păsər-bī′, -bī)n. pl. pas·sers·by also pas·sers-by (păsərz-)
A person who passes by, especially casually or by chance.
- learnedness
- learner
- learning
- learning curve
- learning difference
- learning disability
- learning-disabled
- learning disorder
- learnt
- leasable
- lease
- leaseback
- leasehold
- leaseholder
- leaser
- leash
- leash law
- leasing
- least
- least common denominator
- least common multiple
- least of all
- least squares
- leastways
- leastwise