Bid
AUCTION
A call naming a level and a strain, offering to win that many tricks (plus the book of six) with that strain as trumps.
2♠ offers to win 8 tricks with spades as trumps.
Related
Play duplicate bridge at Nickel Bridge →
Adapted from Wikipedia’s Glossary of contract bridge terms · CC BY-SA 4.0 — our adapted text is shared under the same license.