From Longman Dictionary of Contemporary Englishstoolstool /stuːl/ ●●● S3 noun [countable] 1 
DHFa seat that has three or four legs, but no back or arms a bar stool2 medicalHBH a piece of solid waste from your bowels
DHFa seat that has three or four legs, but no back or arms a bar stool2 medicalHBH a piece of solid waste from your bowelsExamples from the Corpus
stool• You would be safer packing a bucket and a stool and driving a few miles to your nearest Holstein.• Under the window was an easel and a stool and beside it a battered chest of drawers.• a bar stool• I was sitting on my fishing stool wearing winter clothes, and a sailcloth robe thrown over me for extra warmth.• Elder Brother fetched his stool and sat with the others.• He and his girlfriend occupied two stools and had a lot of attitude because they were so successful.• The fluid and ions are lost as watery stool.• She was sitting on a tall wooden stool with a cleaver in her hand, chopping leeks.bar stool• Nicola was shown on a bar stool in a black skirt that barely hid her crutch.• I jumped up on a bar stool and began making a speech.• They also provide a more comfortable perch than a bar stool for those most interested in conversation.• If a patron throws a bar stool, Pat will at least have experience at dealing with it.• I strolled over to a bar stool, mounted up and set Barry down in an ashtray.• Professor Ito pulls himself up tall on his bar stool.• A firm in Maidenhead designed an hydraulically operated bar stool with a large base housing a compressed air tank.• He hoisted himself on to one of the bar stools and nodded in greeting to the barman who was busy serving another customer.Origin stool Old English stol 