I. noun any of the four upright supports of a bedstead. • the best solution in the nineteenth-century home was to drape mosquito netting over the bedposts.
II. phrases 1. between you and me and the bedpost (or the gatepost or the wall)
‹informal› in strict confidence.
2. a notch on someone’s bedpost
‹informal› a sexual conquest, typically one of many
• I didn’t want to be another notch on his bedpost.