Upright
Authority in this area, applied to the world with confidence. Here it concerns a relationship, a feeling or something you care about.
Cups · minor arcana · Water
Authority in this area, applied to the world with confidence. Here it concerns a relationship, a feeling or something you care about.
Authority misused, or competence undermined by ego. Again, in the domain of feeling, relationship and intuition.
The King of Cups sits at the intersection of two things. The suit of Cups covers feeling, relationship and intuition, carried by the element of Water.
The number places it at outward mastery — the suit directed and applied. Put those together and you have the meaning — which is why the minor arcana can be reasoned through rather than memorised.
The image
In the Waite-Smith deck the King of Cups shows a court figure within the imagery of cups. Court cards describe either a person or the way you are behaving in this area.
Every detail in the Waite-Smith deck was placed deliberately by Pamela Colman Smith in 1909, and reading the picture usually gets you further than reading a keyword list. Notice what the figure is doing, where they are looking, and what is behind them.
In a relationship context: authority in this area, applied to the world with confidence. Carried by feeling, relationship and intuition, that plays out through feeling directly.
At work: authority in this area, applied to the world with confidence. The suit points the question at feeling, relationship and intuition.
For health, read the suit first: emotional wellbeing and what you are carrying.
A card means different things by position. In a past-present-future layout, King of Cups in the past describes something already worked through; in the future it describes a direction rather than a fixed outcome.
Read it against its neighbours rather than alone. Two cards from the same suit intensify each other; a major arcana beside a minor tells you the situation is larger than the everyday.