1. Not able to be counted (e.g. because too many to count) 
2. (grammar) of a word that does not have a plural form

Encyclopedia: Uncountable

• kilogram calorie
• kilogram-meter
• kilogram-metre
• kilogramme
• kilohertz
• kilojoule
• kiloliter
• kilolitre
• kilometer
• kilometers per hour
• kilometre
• kilometres per hour
• kiloton
• kilovolt
• kilovolt-ampere
• kilowatt
• kilowatt hour
• Kilroy
• kilt
• kilted
• kilted up
• kilter
• kiltie
• Kim Campbell
• Kimberley