Similar words: come upon, thereupon, look upon, frown upon, enter upon, once upon a time, make up one's mind, stupor. Meaning: [əˈpɒn] 
prep.1. up and on; upward so as to get or be on: He climbed upon his horse and rode off. 2. in an elevated position on: There is a television antenna upon every house in the neighborhood. 3. in or into complete or approximate contact with, as an attacker or an important or pressing occasion: The enemy was upon us and our soldiers had little time to escape. The Christmas holiday will soon be upon us and we have hardly begun to buy gifts. The time to take action is upon us. 4. immediately or very soon after: She went into mourning upon her husband's death. 5. on the occasion of: She was joyful upon seeing her child take his first steps. 6. on (in any of various senses, used as an equivalent of on with no added idea of ascent or elevation, and preferred in certain cases only for euphonic or metrical reasons): He swore upon his honor as a gentleman..
prep.1. up and on; upward so as to get or be on: He climbed upon his horse and rode off. 2. in an elevated position on: There is a television antenna upon every house in the neighborhood. 3. in or into complete or approximate contact with, as an attacker or an important or pressing occasion: The enemy was upon us and our soldiers had little time to escape. The Christmas holiday will soon be upon us and we have hardly begun to buy gifts. The time to take action is upon us. 4. immediately or very soon after: She went into mourning upon her husband's death. 5. on the occasion of: She was joyful upon seeing her child take his first steps. 6. on (in any of various senses, used as an equivalent of on with no added idea of ascent or elevation, and preferred in certain cases only for euphonic or metrical reasons): He swore upon his honor as a gentleman.. 
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(91) It is rude to remark upon the appearance of other people.
(92) We mustn't presume too much upon the reliability of such sources.
(93) He looked indifferently upon subjects that did not interest him.
(94) He never allows work to encroach upon his family life.
(95) I heartily congratulate you upon your choice of your partner for life since l can't think of two people more suited to each other than you two.I wish you all the happiness in the world.
(96) By gravitation the sun and planets act and react upon one another.
(97) She rounded upon him in the office,charging him with telling lies about her.
(98) All the love stories have something in common. Once upon a time, I have that experience too. but I can not remember it clearly. All I can remember is that love returns with another man bringing new hopes to me.
(99) We will never allow anybody to encroach upon China's territorial integrity and sovereignty.
(100) Originally paper money could, upon demand,(sentencedict.com) as of right be changed into gold.
(101) The dog hurt one of its pad when it stepped upon a thorny path.
(102) They are dependent upon importation from foreign countries for cotton and grain.
(103) My heart beats her waves at the shore of the world and writes upon it her signature in tears with the words, "I love thee.
(104) A man with a paper hat upon his head was gesticulating wildly.
(105) I hauled upon his hand and made him off the cliff.
(106) The rogue blew upon the scheme and so betrayed his partner to the police.
(107) I came upon an irresistible item at a yard sale.
(108) He tried to practice upon the imagination and credulity of the public.
(109) The shelf was beginning to sag beneath the weight of the books upon it.
(110) Once upon a time in a faraway land there lived a princess in a big castle.
(111) The radiation leak has had a disastrous effect on/upon the environment.
(112) The Constitution of Canada is modeled upon that of England.
(113) Allow me to join the chorus of congratulations upon your recent marriage.
(114) All eyes are fixed upon Asia as the Land of Promise for millions yet unborn.
(115) Nor are the insights of happiness limited to what is near around you. Unhappy, with your thoughts turned in upon your emotional woes, your vision is cut short as though by a wall. Happy(Sentence dictionary), the wall crumbles.
(116) good book is a best friend who never turns his back upon us.
(117) The child sat trifling with the burnt bread upon his plate.
(118) Flowers rained upon them.
(119) New love is brightest, and long love is greatest; but revived love is the tenderest thing known upon earth.
(120) Your report last week was unfair. It was based upon wholly unfounded and totally unjustified allegations.
More similar words: come upon, thereupon, look upon, frown upon, enter upon, once upon a time, make up one's mind, stupor, made up of, be made up of, pony, pond, weapon, ponder, keep on, sponsor, postpone, opponent, respond, component, sponge off, response, postponed, proponent, ponderous, correspond, respondent, despondent, responsive, spontaneous.