a skirt above the knee

a Determinative

— A is used when the following word could be any of a certain type. Compare "A book I saw on the shelf" and "The book I gave you yesterday".

a Noun

— A is the first letter of the alphabet. The letter "a" comes before "b". — In some schools, an A is a very high grade. Ron got an A on his earth science test.

skirt Noun

— A skirt is a loose cloth that a woman uses to cover her legs; the lower part of a dress. She has a blue skirt and a red shirt on.

above Preposition

— (, after the noun &; ) If A is above B, A is higher than or before B, but not touching B. In a newspaper, the title of a story is usually above the story. Only children aged 5 and above may enter. That office is on the floor above. Our blessings come from above. The passage above is easy to understand.

above Adjective

— If something is above, it is higher than or coming before. Please see the above discussion of the problem.

the Determiner

— Used, instead of a, to reference something specific, already known to exist. Compare "I read a book." and "I read the book." — Used with a stress, to show that the word following is special. Are you the John Smith that I went to school with? — Used with an adjective that acts like a noun to mean all of the people concerned The poor are always with us. — Used with superlatives forms of adjectives and adverbs. You are the best.

knee Noun

— Part of the leg between the thigh and the shin. I hurt my knee in football.

knee Verb

— To hit someone or something with the knee. He kneed me in the leg.