Definition of Loathsome: Loathsome (adjective): Causing feelings of disgust or hatred; highly offensive or revolting. Synonyms: disgusting, revolting, repulsive, abhorrent Antonyms: delightful, pleasant, charming, likable Memory Tip: Think of “loathsome” as something or someone that makes you feel sick or disgusted, like a spoiled meal or a horrible attitude that you can’t stand to be…