1 [C,U] a hard, bright precious stone which is very expensive and is used for making jewellery. A diamond usually has no colour. 钻石；金刚钻

2 [C] a flat shape that has four sides of equal length and points at two ends 菱形 ☞picture at shape 见shape插图

3 diamonds [pl] the group (suit) of playing cards with red shapes like diamonds(2) on them 红方块花色的纸牌: the seven of diamonds 方块七 ☞Look at the note and picture at card. 参看card的注释及插图。

4 [C] one of the cards from this suit （扑克中的一张）方块牌: I haven't got any diamonds. 我没有方块牌。