sidely adjective 1adverb 1forms 2 adjective1 •(nonstandard, rare) Of or relating to the side (of something); lateral.“[…] The evidence of that philosophy is found in its perennial focus on a 'this-sidely' world and an 'other-sidely' world.” — 2001 adverb1 •(nonstandard, rare) To the side; sideways; laterally; sideling; obliquely; indirectly. formsmore sidely · most sidely