rock-solid

adjective

rock-sol·​id ˈräk-ˈsä-ləd 

variants or rock solid

: completely or perfectly solid (as because of great strength or dependability)

supported by a rock-solid foundation

She has a rock-solid reputation.

Their relationship was rock solid.

… she moved in an artificial world without ever losing her rock-solid integrity.

—Walter Clemons

He is right to imply that the political structure is a little shaky—it was a myth that it was ever rock solid.

—Xan Smiley

Examples of rock-solid in a Sentence

Recent Examples on the Web

Get a glimpse at two rock-solid playoff teams to start the evening, and both have the chance to firm up seeding here with just a week left in the regular season. —Chris Branch, New York Times, 8 Apr. 2026

Together with Hanks, the trio has potential to form a rock-solid rotation. —Edgar Thompson, The Orlando Sentinel, 8 Apr. 2026

Featuring magnetic and screw-free mounting, these cameras snap onto any metal surface for a rock-solid hold in seconds. —Juhi Wadia, PC Magazine, 6 Apr. 2026

The home’s slate roof, copper gutters and rock-solid foundation signal a different kind of luxury — one rooted less in square footage and more in construction, craftsmanship and permanence. —David Caraccio april 4, Sacbee.com, 4 Apr. 2026

Word History

First Known Use

1871, in the meaning defined above

Rhymes for rock-solid

• semisolid
• solid
• squalid
• stolid