1. Limited, circumscribed; enclosed. 2. Denoting a substance, such as iodine, phosphorus, calcium, morphine, or another drug, that is not in readily diffusible form but exists in combination with a high–molecular weight substance, especially protein. 3. Fixed to a receptor, such as on a cell wall.
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bound 'bau̇nd adj
1) made costive: CONSTIPATED
2) held in chemical or physical combination <\bound water in a molecule>
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(bound) 1. restrained or confined; not free. 2. held in chemical combination.Medical dictionary. 2011.