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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!
See also: grasp, have, of, on, solid, sound

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!
See also: get, grasp, of, on, solid, sound

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.
See also: rock, solid

*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.
See also: rock, solid

(as) solid as a ˈrock

extremely solid and reliable: The Irish team were solid as a rock in defence. ▶ ˌrock-ˈsolid adj.: The company has a rock-solid reputation.
See also: rock, solid


1. mod. good; great; cool. Listen to that solid beat.
2. mod. consecutive; consecutively. Then he “had the flu” for three days solid.
References in periodicals archive ?
7 : reliable, dependable <a solid citizen> <solid advice>
Solid fuel use varied widely among the low-income regions, from 77% in sub-Saharan Africa to 16% in Latin America.
Rhino, from Robert McNeel & Associates (Seattle, WA), is an extremely inexpensive, Windows-based, free-form 3D modeling program that handles non-uniform rational B-spline (NURBS) curves, surfaces, and solids.
As the scientists continued to lower the temperature, they detected signs that at about 175 millikelvins the solid version of the isotope helium-4 stopped being dragged around because of friction with the disk.
Gary Liss, a consultant who has worked with the city in developing the program, says that the move by Hawthorne will maintain a franchise arrangement for solid waste hauling, as well as the handling of "dirty" recyclables.
In order to create a solid waste authority, State legislation is required.
Boxes, corrugated and solid fiber, made from purchased paper or paperboard
The two booster rockets flanking the space shuttle's liquid-fuel engine run on solid propellant.
Molten metals and slurries with a low solid fraction have little resistance to deformation and are characterized by a viscosity that defines their ability to flow.
Though the software products differ in how much automation they offer, almost all of them involve roughly the same steps to produce a solid model of a mold assembly:
Solid Innovation[R] - Solid Innovation and all related product and service names are trademarks or registered trademarks of Solid Innovation Technologies, Inc.
It would be easy to replace the entire disk subsystem with a Solid State Accelerator, but this may not be needed.
Because these slabs are extra dense, they tug on the solid inner core and raise welts a hundred meters or so that stick up into the fluid outer core.
It's not that unusual these days for molders to use 3D solid modeling for part design.
With its passage a certainty this year, Congress then will turn its attention to item number two on its environmental agenda: solid waste disposal.