mean的名词是meaning,

n. (声音、文字、信号等传递的)意义，意思; (想要表达的)意义; 真正重要性; 价值;

形容词是meaningful

adj. 严肃的; 重要的; 重大的; 意味深长的; 意在言外的; 意义明显的; 易于理解的;

例句：

It had been years since they had shared any meaningful form of physical relationship.

他们已多年没有真正意义上的性生活了。

You should be able to guess the meaning of the word from the context.

你应该能从上下文猜出这个词的含义。