The phrase "in poor condition" refers to objects or things that are damaged or not in good shape. Antonyms of this phrase include "in good condition," "well-maintained," "flawless," "immaculate," "mint," and "pristine." These words indicate objects that have been taken care of and are functioning optimally. Alternatively, "brand new," "unused," "untouched," and "unharmed" all suggest items that have not experienced any wear-and-tear or damage. Using these antonyms, one can describe a car that is in good condition, a house that is well-maintained, or a book that is brand new. Antonyms of "in poor condition" can be useful to provide a more positive or descriptive tone in writing or conversation.