on (EN)
preposition, adjective, adverb

preposition “on”

on, upon
  1. positioned at the upper surface of
    The cat is sleeping on the warm hood of the car.
  2. attached to
    There is a painting on the wall.
  3. expressing figurative placement, burden, or attachment
    The blame for the mistake fell squarely on her shoulders.
  4. denoting an action done by contact with the surface of something
    She drew a heart on the foggy window with her finger.
  5. at or in a certain region or location
    The grocery store is on Maple Street.
  6. near, alongside
    The boat is on the coast.
  7. supported by the specified part of itself
    The cat slept on its back in the warm sunlight.
  8. imparting force to
    Pull on the door handle to open it.
  9. impacting against
    I bumped my head on the low doorway as I entered the room.
  10. covering
    She placed a warm hat on her head before stepping outside.
  11. inside a vehicle of public transport for the purpose of travelling
    She was on the train reading a book when the announcement came through.
  12. at the date of
    The meeting is scheduled on March 15th.
  13. sometime during the given day
    We're having a picnic on Saturday.
  14. dealing with the subject of
    She attended a lecture on quantum physics.
  15. in the possession of
    Sorry, I can't lend you a pen; I don't have one on me right now.
  16. because of; due to; upon the basis of something not yet confirmed as true
    The teacher called her parents on the assumption that she had cheated on the test.
  17. paid for by
    Lunch is on the company today, so order whatever you like!
  18. indicating a means or medium
    She listened to her favorite song on the radio.
  19. indicating the target of, or thing affected by, an event or action
    The joke had no effect on him; he didn't even smile.
  20. indicating a means of subsistence
    She managed to get by on her small pension.
  21. engaged in or occupied with an action or activity
    She's on a call right now, can I take a message?
  22. regularly taking a medicine or drug
    He's been on painkillers since the surgery last month.
  23. under the influence of a medicine or drug
    She couldn't focus at work because she was on strong painkillers after her surgery.
  24. indicating multiplication or succession in a series, e.g. complaints upon complaints
    She piled books on books on her desk until it towered dangerously high.
  25. indicating dependence or reliance
    She relied on her GPS to find the way.
  26. serving as a member of
    She's on the school board, so she attends all the meetings.
  27. swearing on, e.g. on my life, on God
    "On my mother's grave, I didn't take your phone."
  28. against, especially when numbers of combatants or competitors are specified
    In the soccer match, it was ten on eleven after one player received a red card.

adjective “on”

on, non-gradable
  1. in the state of being switched on, active or operating
    The air conditioning is on; I can feel the cool breeze.
  2. performing according to schedule; taking place
    Is the meeting still on?
  3. fitted; covering; being worn
    As soon as the helmet was on, the cyclist felt ready to hit the road.
  4. having reached a base as a runner and being positioned there, awaiting further action from a subsequent batter
    The pitcher looked nervous with runners on second and third, knowing any hit could send them home.
  5. within the half of the field on the same side as the batsman's legs; the left side for a right-handed batsman
    The bowler aimed for the on side, hoping to exploit the batsman's weakness there.

adverb “on”

on
  1. in continuation, at length
    She kept talking on about her vacation plans, her new recipes, her garden, and her cats.
  2. to an operating state
    Please switch the lights on when you enter the room.
  3. so as to cover or be fitted
    He put his hat on and stepped out into the sun.
  4. continuing an action
    Keep on walking until you reach the end of the path.
  5. of betting odds, denoting a better-than-even chance
    The boxer was ten-to-one on to win the match, indicating he was heavily favored by the bookmakers.