signed /saɪnd/ adjective3 •Having a signature; endorsed.The signed check could be cashed. •Having both positive and negative varieties.It wasn't until they tried to subtract 3 from 1 that the elementary school students realized they needed signed numbers. •Furnished with signs and signposts; signposted.Turn left on poorly signed Highway 292 and proceed on this winding road for about 12 miles. — 2013