The Collaborative International Dictionary of English v.0.48:
Verst \Verst\, n. [Russ. versta: cf. F. verste.] A Russian measure of length containing 3,500 English feet. [Written also werst.] [1913 Webster]WordNet (r) 3.0 (2006):
verst n 1: a Russian unit of length (1.067 km)