1 hard and firm; not in the form of liquid or gas 坚固的；固体的: It was so cold that the village pond had frozen solid. 天气太冷了，村里的水塘也结了冰。

2 having no holes or empty spaces inside; not hollow 实心的；无孔的: a solid mass of rock 一大块实心的岩石

3 strong, firm and well-made 坚固的；结实的: a solid little car 牢固可靠的小汽车 (figurative 比喻) They built up a solid friendship over the years. 这些年来他们建立了牢固的友谊。

4 of good enough quality; that you can trust 可靠的；充分的: The police cannot make an arrest without solid evidence. 警方没有充分的证据不能逮捕人。

5 (only before a noun 只用于名词前) made completely of one substance, both on the inside and outside 纯质的（由里至外都用同一物质制成）: a solid gold chain 纯金链子

6 (spoken 口语) without a break or pause 无间断的；连续的: I was so tired that I slept for twelve solid hours/twelve hours solid. 我太累了，连续睡了十二个小时。 ➔solidity /səˈlɪdəti ||; səˈlɪdətɪ/ noun [U]