1. the quality or state of being putrid; decay or rottenness, especially of organic matter
2. a foul or offensive smell resulting from decay

Examples

• The putridness of the abandoned meat made the kitchen unbearable.
• The swamp's putridness was evident from the moment we approached it.
• After weeks without refrigeration, the fish developed a putridness that filled the entire room.
• The putridness of the decaying leaves created a distinctive forest smell.
• He could not tolerate the putridness emanating from the old compost pile.
• The putridness of the corpse indicated it had been dead for several days.