[ awf-ley-buh l, of‐ ]
/ ˈɔfˈleɪ bəl, ˈɒf‐ /

adjective Informal.

of, relating to, or denoting a drug prescribed for a particular indication even though the drug has not yet received approval from the Food and Drug Administration for that disease, condition, or symptom. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for off-label