From middle english top, toppe, from old english topp (“top, highest part; A top is a piece of clothing that you wear on the upper half of your body, for example a blouse or shirt. Idioms off the top of one's head, without thought or preparation:
Our American Presidents Their Lives And Legacies (DVD), Marshall
[singular] the top (of something) the highest or most important rank or position he's at the top of his profession. How to use top in a sentence. The flat upper surface of something:
Uppermost, highest, greatest, or foremost.
The top drawer, top honors. Of, situated at, or being the top; Another style that you can incorporate into your wardrobe is the ruffled top. The highest place or part:
Of the highest degree, quality, rank, or amount: See examples of top used in a sentence. The highest or loftiest point or part of anything on a slope; These look uber chic when tucked into.
The meaning of top is the highest point, level, or part of something :
Off the top of my head i would say we've lost 83% of our oil refining.