Signposted means marked with signs showing the way. Well signposted, badly signposted, signposted from the motorway.
It is used most in the negative, since people mention signs only when they are missing. Figuratively a signposted ending in a story is one you could see coming.
1adjectivesignpostedMarked with signs showing the way.
“The path is signposted from the car park onwards.”
signposted is a quality.
signpost comes from sign + post.
Etymology from Wiktionary, CC BY-SA