1. [adjective] Fixed in one position; immobile; unable to move.
2. [adjective] (figuratively) Ingrained, as through repeated use; entrenched; habitual or instinctive.
3. [adjective] (figuratively) (usually with 'in') Having a basic or fundamental connection (to a thing); based, originating (from).
4. [adjective] (mathematics) (graph theory) (of a tree or graph) Having a root.
5. [adjective] (slang) In trouble or in strife, screwed.
6. [adjective] (Australia) (New Zealand) (slang) Broken, damaged, non-functional.
7. [adjective] (computing) (uncomparable) Having a root (superuser) account that has been compromised.
8. [verb] Simple past tense and past participle of root
9. [adjective] Absolutely still; 'frozen with horror'; 'they stood rooted in astonishment'.