In the Tarot, the Suit of Cups are usually depicted as chalices, though some decks may use bowls or other vessels that can hold Water, the element represented by Cups. Cups are feminine and represent the emotional life and relationships. When a layout contains many Cups, chances are good that the reading will focus on the emotional life of the Querent, though it may not necessarily pertain to romantic relationships.
The watery astrological signs are Cancer, Scorpio and Pisces. Additionally, cups were the symbol of the clergy in feudal times, and thus cup cards can also be interpreted as having to do with spiritual or religious matters.
Like Water, the emotions represented in the Cups cards are mutable and changeable, but they are not weak. When you combine the suit with the numbered card, think of emotions.

Ace of Cups: New beginning emotionally. All aces signify a new beginning. Start of new relationship. New love. New friendship. Very strong initial attraction. Passionate involvement in work or project. Upsurge of strong feelings. Deep love or deep hate, maybe at the same time. Emotional fulfillment. Being in touch with emotions. Extent modified by surrounding cards. Reversed: The need to get out emotionally.
Two of Cups: Friendship. Relationship success. Start of new relationship. Early stages of relationship. New phase in existing relationship, whether good or bad. News of a happy event. New attraction. Infatuation. Extent modified by surrounding cards. Reversed: Souring of friendship or relationship. Jealousy.
Three of Cups: Celebration. Peak experience after which life resumes. Birth of child. Ceremony. Wedding. Engagement. Joyful time. Sharing good times with loved ones. Reunion with friends. Extent modified by surrounding cards. Reversed: Tension between friends or family.
Four of Cups: Discontent. Boredom. Mundane, routine. Refusal to look on the bright side. Bad attitude. Examine mood of discontent. Reality versus feelings. Reaching out for new. Extent modified by surrounding cards. Reversed: Apathy. Staying with status quo.
Five of Cups: Regret and sorrow. Disappointment in love. Change and difficulty. Emotional difficulty. Relationship problems with friends or loss of friends. Regret over decisions. Disillusionment. Deceit. Treachery. Betrayal. Unexpected troubles from unexpected places. Nearby cards can reveal whether your fault or not. Something has been lost, but something can be redeemed. Extent modified by surrounding cards. Reversed: Despondency. Failure to look at the bright side.
Six of Cups: Past memories and future dreams. Help on the way from friends, family, or mentor. Memory and nostalgia. Long held dream may become reality. Old friendship or love rekindled. Dream materializes. Learning to live in harmony. Extent modified by surrounding cards. Reversed: Living in the past. Dwelling on the past.
Seven of Cups: Deceit, broken promises, lying. The illusion of success, but not permanent. Relationship difficulties. Selfishness. Possessiveness. Disloyalty. Vanity. Drunkenness. Substance abuse. Physical abuse. Daydreaming with nothing coming to fruition. Extent modified by surrounding cards. Reversed: Too many choices resulting in inactivity.
Eight of Cups: Regeneration. Change is in the air. Something has run its course. Something close to your heart is no longer working. Leave the past behind for the unknown. Don’t stagnate. Move on to a deeper level. Extent modified by surrounding cards. Reversed: Clinging on after something is over.
Nine of Cups: Sensual satisfaction. Wish card. Dream will be realized. Wish will come true. Something close to the heart. Precious, treasured, sensual moment. All five senses. Enjoy relationships and commit to realizing a dream. Positive time for making things happen. Good health time. Extent modified by surrounding cards. Reversed: Not giving enough, hoarding, foolish, vain, conceited, jealous.
Ten of Cups: Contentment, happy home life. Good relationships. Enjoyment of ordinary pleasures. Permanent satisfaction. Enjoying the fruits of work on relationships. Emotional commitment. New love or revival of old love. Extent modified by surrounding cards. Reversed: Insecurity, instability of relationships.
Page of Cups: Young woman with brown hair and brown or blue eyes. New emotional beginnings. Emergence of new feelings. Change of heart. New talent or idea. Immature ideas. Potential and possibility. Early stages of something. New contacts socially. Message with news or opportunity. Extent modified by surrounding cards. Reversed: Emotional withdrawal, selfish.
Knight of Cups: Young man with brown hair and brown or gray eyes. The lover. Time to pursue ideals. Intense, but with a calm exterior. Spirit of romance entering life. Upsurge of romantic or artistic traits. Becoming lost in fantasy world. Emotionally sensitive man. Extent modified by surrounding cards. Reversed: Emotionally inhibited, evil, merciless.
Queen of Cups: A woman with light brown hair and blue eyes. The beloved. Don’t ignore feelings. Control over emotions. Someone entering your life who is attractive and magnetic. You enter someone’s life and they think you are attractive and magnetic. Need to delve into your own feelings. Emotionally sensitive woman. Extent modified by surrounding cards. Reversed: Holding back emotions in some cases.
King of Cups: A man with blonde or light brown hair and blue eyes. One who both loves and fears. Strong desire to be involved with other people, but fear of the danger. Someone in your life afraid of commitment or deep involvement, or you have those traits. Extent modified by surrounding cards. Reversed: Cold and withdrawn, dishonest, double dealing.