These terms are used in contract bridge,[1][2] using duplicate or rubber scoring.
Some of them are also used in whist, bid whist, the obsolete game auction bridge, and other trick-taking games.
A cuebid of opponent's suit below 3NT, showing a partial stop in that suit and requesting partner to bid notrump with a holding such as Qx or Jxx.
Similarly in the second, lead the ♥2 and when West follows with the ♥9, it is best to finesse the ♥10.
When one of the missing honors is the 10 the rule will not apply, as one does not normally finesse for a 10 on the first round.