The Collaborative International Dictionary of English v.0.48:
Byway \By"way`\, n. A secluded, private, or obscure way; a path or road aside from the main one. " Take no byways." --Herbert. [1913 Webster]WordNet (r) 3.0 (2006):
byway n 1: a side road little traveled (as in the countryside) [syn: byway, bypath, byroad]