second (¹⁄₆₀ of a minute) / second (extremely short period of time) / the second one (anything that comes immediately after the first)

second (ordinal numeral for 2) / second; subsequent; other; further (coming after the first) / secondary (lesser in importance or rank)

second (in second place)

according to (based on what is stated by)

as (at the same time that) / as (according to what)

first-person singular present indicative of segundar

(ordinal number) twelfth

backburner (state of having lower priority) / background (computing: activity not visible to the user)

(Brazil, education, dated) the education stage equivalent to high school

(medicine) second-degree burn (burn that blisters the skin)