Indicating the position of something in a list or sequence. Abbreviations: No or No., no or no. (in each case, sometimes written with a superscript "o", like Nº or №). The symbol "#" is also used in this manner.
From Middle English number, nombre, numbre, noumbre, from Anglo-Norman noumbre, Old French nombre, from Latin numerus ("number"), ultimately from Proto-Indo-European *nem- ("to divide"). Compare Saterland Frisian Nummer, Nuumer, West Frisian nûmer, Dutch nummer ("number"), German Nummer ("number"), Danish nummer ("number"), Swedish nummer ("number"), Icelandic númer ("number"). Replaced Middle English ȝetæl and rime, more at tell, tale and rhyme.