See also: 1/O, 1-O, and

FrenchEdit

AdverbEdit

1o

  1. 1st (Abbreviation of primo.)

SpanishEdit

AdjectiveEdit

1o (feminine singular 1.a, masculine plural 1os, feminine plural 1.as)

  1. 1st (Abbreviation of primero.)

Usage notesEdit

Usually written with the ordinal indicator 1.º.