- (diamond) rhombus: a parallelogram with four equal sides; an oblique-angled equilateral parallelogram
- A precious stone consisting of a clear and typically colorless crystalline form of pure carbon, the hardest naturally occurring substance
- (diamond) a transparent piece of diamond that has been cut and polished and is valued as a precious gem
- (diamond) very hard native crystalline carbon valued as a gem
- A tool with a small stone of such a kind for cutting glass
- In extended and metaphorical use with reference to the brilliance, form, or hardness of diamonds
- An act of causing a bell to sound, or the resonant sound caused by this
- Each of a series of resonant or vibrating sounds signaling an incoming telephone call
- (ring) a characteristic sound; "it has the ring of sincerity"
- (ring) sound loudly and sonorously; "the bells rang"
- gymnastic apparatus consisting of a pair of heavy metal circles (usually covered with leather) suspended by ropes; used for gymnastic exercises; "the rings require a strong upper body"
- A telephone call