a person who manifests high-minded devotion to clean living and moral righteousness.
Origin of straight arrow
First recorded in 1965–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
informal, mainly US
- a clean-living and honest person
- (as modifier)a straight-arrow cop
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012