strange; outstanding; of a form of a noun, pronoun, used to refer to one person or thing
unique, odd
Cases of word usage
1) a written sign or symbol for a quantity; particular quantity or amount; a dance, song etc for the stage; the way of showing singular and plural, such as 'child/children' (number)
2) to produce (musical sounds or words) with the voice; singular (as used in this dictionary) (sing)