|1.||a narrow lane or passage, esp one between or behind buildings|
|2.||See bowling alley|
|3.||chiefly (US) tennis the space between the singles and doubles sidelines|
|4.||a walk in a park or garden, esp one lined with trees or bushes|
|5.||up one's alley, down one's alley See street|
|[C14: from Old French alee, from aler to go, ultimately from Latin ambulāre to walk]|
up one's alley
see under right up one's alley.