S: (adj) firm (firm%3:00:00:hard:01), solid (solid%3:00:00:hard:01) (not soft or yielding to pressure) "a firm mattress"; "the snow was firm underfoot"; "solid ground"
S: (adj) solid (solid%3:00:00:cubic:00) (having three dimensions) "a cube is a solid figure with six sides"
S: (adj) solid (solid%3:00:00:opaque:00) (impenetrable for the eye) "solid blackness"
S: (adj) solid (solid%3:00:00:sound:00) (financially sound) "the bank is solid and will survive this attack"
S: (adj) solid (solid%3:00:00:serious:00) (of a substantial character and not frivolous or superficial) "work of solid scholarship"; "based on solid facts"