present participle of top the charts

(music, also by extension) To be the most popular recording at a particular time.

Alternative form of toploading

Alternative form of topbox

plural of top-box

plural of top-case

Alternative form of topcase

Alternative letter-case form of top 40

(automotive) A position in the four-stroke combustion process wherein the piston is at the topmost point in its stroke. This can either be during the compression phase or the combustion phase.

(computing, Internet) The last component of a domain name, such as .com, .edu, .gov, .net, .org, .mil, .mobi or any of the newer generic top-level domains, or any of the ccTLDs. Abbreviated TLD.