A toilet is a piece of sanitary hardware that collects human urine and feces, and sometimes toilet paper, usually for disposal. Flush toilets use water, while dry or non-flush toilets do not. They can be designed for a sitting position popular in Europe and North America with a toilet seat, with additional considerations for those with disabilities, or for a squatting posture more popular in Asia, known as a squat toilet. In urban areas, flush toilets are usually connected to a sewer system; in isolated areas, to a septic tank. The waste is known as blackwater and the combined effluent, including other sources, is sewage. Dry toilets are connected to a pit, removable container, composting chamber, or other storage and treatment device, including urine diversion with a urine-diverting toilet.

संडास, अर्थात शौचालय, ही माणसांच्या विष्ठा व मूत्र यांच्या विसर्जनासाठी बांधलेली सुविधा असते. सहसा संडास वा शौचालय या संज्ञा या सुविधेसाठी बांधलेल्या खोलीला उद्देशून वापरल्या जातात. विष्ठा व मूत्राच्या विसर्जनासाठी वापरल्या जाणाऱ्या भांड्याला संडासाचे भांडे असे म्हटले जात असले, तरीही काही वेळा त्यास ढोबळ अर्थाने संडास असेही उल्लेखले जाते.