The Collaborative International Dictionary of English v.0.48:
Overspread \O`ver*spread"\, v. t. [imp. & p. p. Overspread; p. pr. & vb. n. Overspreading.] [AS. oferspr[=ae]dan.] To spread over; to cover; as, the deluge overspread the earth. --Chaucer. [1913 Webster] Those nations of the North Which overspread the world. --Drayton. [1913 Webster]