(finance) Of a deal: concluded by the secretary of the stock exchange when the actual dealer has failed to do so.

plural of under-extension

Alternative form of underextension.

Alternative form of voiceunder

plural of voice-under

Synonym of on pain of

A gambling game where players bet on whether a number of rolled dice will sum to less than, more than, or exactly seven.

(figuratively) Outdoors at night.

plural of dive-under

(rail transport) A railway junction where at least one track passes under other lines instead of crossing them on the same level, in order to avoid conflicting movements; an underpass.