s (EN)
letter, symbol

This word can also be a form of:
S (letter, noun, symbol)

letter “s”

s
  1. the lowercase form of the letter "S"
    The word "snake" starts with the letter "s".

symbol “s”

s
  1. a second (unit of time)
    The microwave timer was set for 30 s to warm up the leftovers.