Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “rock-solid”


adjective     /ˌrɒkˈsɒlɪd/ US  /ˌrɑːkˈsɑːlɪd/
not likely to move or break : I've fixed the table - it's rock-solid now.Hard and firmImmobility
(Definition of rock-solid adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of rock-solid

Browse related topics

You are looking at an entry to do with Immobility, but you might be interested in these topics from the Moving quickly and slowly topic area:

Word of the Day

grand prix

one of a series of important international races for very fast and powerful cars

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More