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Related to solid: States of matter
have a (good/solid/sound/etc.) grasp of/on (something)
To have a firm, clear understanding or determination of something. I hope everyone has a solid grasp of the material, as you'll be tested on it next week. I thought I had a pretty good grasp on English idioms, but I don't understand this one at all!
get a (good/solid/sound/etc.) grasp of/on (something)
To attain a firm, clear understanding or determination of something. You will need to get a solid grasp of the material, as you'll all be tested on it next week. I'm trying to get a grasp on English, but I don't understand some of these idioms at all!
be (as) solid as a rock
To be stable, sturdy, and reliable. They've been married for 50 years, so their relationship has to be solid as a rock. That table must be as solid as a rock to withstand the ceiling collapse with hardly a scratch.
*solid as a rock
Cliché very solid; dependable. (*Also: as ~.) Jean has been lifting weights every day, and her arm muscles are solid as a rock. This company has always built power tools that are as solid as a rock.
(as) solid as a ˈrockextremely solid and reliable: The Irish team were solid as a rock in defence. ▶ ˌrock-ˈsolid adj.: The company has a rock-solid reputation.
1. mod. good; great; cool. Listen to that solid beat.
2. mod. consecutive; consecutively. Then he “had the flu” for three days solid.