signpost

Word family

• signposted
  adjectiveB1
• signposting
  nounC1

Synonym discussion

Sense: noun/2

All four words describe something that points toward a future outcome or direction, but they differ in nuance. 'Indicator' is the most neutral and widely used, especially in statistics and business — an economic indicator is a data point, not a suggestion. 'Marker' emphasises a notable point or threshold rather than a direction; a marker in a scientific study marks a boundary or milestone. 'Guide' is more active: a guide steers decisions and implies the thing is meant to be followed. 'Signpost' is the most metaphorical of the four, carrying a visual image of a literal road sign; it strongly suggests that the future path is being made clear or intentional. For example: 'Rising inflation is an indicator of economic trouble' (data point), whereas 'The government's green investment plan is a signpost for the industries of tomorrow' (deliberate direction-setting).

Common collocations

Etymology

The word 'signpost' dates from the early 1600s and is a straightforward compound of 'sign' (a mark or symbol with a meaning) and 'post' (a piece of wood set upright in the ground). The literal meaning — a post bearing a directional sign — has been in use since the 17th century. The figurative use (something that points the way metaphorically) emerged later, around the mid-19th century, first appearing in literature and political writing.