'To draw a straight furrow' definitions:

Definition of 'To draw a straight furrow'

From: GCIDE

Furrow \Fur"row\, n. [OE. forow, forgh, furgh, AS. furh; akin to D. voor, OHG. furuh, G. furche, Dan. fure, Sw. f?ra, Icel. for drain, L. porca ridge between two furrows.]
1. A trench in the earth made by, or as by, a plow. [1913 Webster]
2. Any trench, channel, or groove, as in wood or metal; a wrinkle on the face; as, the furrows of age. [1913 Webster]
Farrow weed a weed which grows on plowed land. --Shak.
To draw a straight furrow, to live correctly; not to deviate from the right line of duty. --Lowell. [1913 Webster]