As tough, hard, or inflexible as a piece of rock. / (bodybuilding) With muscles developed and toned to a high degree, especially the muscles of the abdomen.

(idiomatic) To disturb the status quo or go against rules or conventions, as in an effort to get attention.

A suite of rocks containing a variety of separate strata, with an overall lithology that can be used to interpret the paleoenvironment of deposition over a certain period.

A chair with a curved base which can be gently rocked (swung) back and forth.

(music) Glam rock, a music style popular in the early 1970s.

(music) A style of English rock music from the early 1970s, distinguished by the glamorous, glittery costumes of its performers and its bouncy beat and lyrics.

A stocky bird, Anthus petrosus, somewhat smaller than a starling, that breeds on rocky beaches and winters on coastal salt marshes.

(geology) one of the major groups of rock that makes up the crust of the Earth; formed by the cooling of molten rock, either below the surface (intrusive) or on the surface (extrusive)

(geology) one of the major groups of rock that makes up the crust of the Earth; consists of pre-existing rock mass in which new minerals or textures are formed at higher temperatures and greater pressures than those present on the Earth's surface

(geology) One of the major groups of rock that makes up the crust of the Earth; formed by the deposition of either the weathered remains of other rocks, the results of biological activity, or precipitation from solution.