(irrespective of present orientation) the part of something that is usually the top. / The uppermost part of a page, picture, viewing screen, etc. / A lid, cap or cover of a container.

To cover on the top or with a top. / To excel, to surpass, to beat, to exceed. / To be in the lead, to be at number one position (of). / To cut or remove the top (as of a tree)

Situated on the top of something. / (informal) Best; of the highest quality or rank. / (informal) Very good, of high quality, power, or rank.

Rated first.

Atop / Very close to, in any orientation or in time. / (idiomatic) In addition to something else. / (idiomatic) Fully informed about, and in control of, something; up to speed with.

On the highest point or surface. / (idiomatic) In a dominant position.

(informal) At the very most; as a maximum.

(slang, dated) Great; excellent.

plural of top

(darts) The uppermost field of a dartboard; the double-20 field