Meld
A scoring card combination. Its permitted timing and use come from the selected rules.
Trick
A round of played cards with a winner determined by suit and rank rules.
Trump
The suit given special power for the hand.
Stock
Undealt cards used during the relevant phase of a drawing game.
Going set
Failing a bid commitment, with the consequence defined by the version.
These are reading aids. They do not establish a shared bidding or penalty system across every form of Pinochle.