How would you describe a solute molecule that is surrounded by solvent molecules?
By definition, "solvated". Whimsically, maybe 'happy', 'gregarious', 'in demand', 'crowded'... ;)
When a solute molecule is "surrounded" by the solvent, it is simply in solution, or solvated. If you want to distinguish this condition from one in which it may connect with other solute molecules you might say that it is 'diluted'.