coincidence的基本意思是相同的事件或情形由于偶然的机会在同一时间出现,即“巧合”,可用作可数名词或不可数名词。也可指事情、口味、故事等“符合,一致”,作此解时只用作不可数名词。

She and I both arrived at the same time by pure coincidence.她和我同时到达纯属巧合。
By a strange coincidence we happened to be traveling on the same bus.巧得出奇,我们正好坐同一辆公共汽车。
Is there any coincidence between his opinions and your own?他的观点与你自己的有无一致之处?

［同义词］   accident, chance
［反义词］   plan, plot, prearrangement