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.

(idiomatic) Very loudly; as loudly as (vocally) possible.

A device that connects some source of signal to a television set, often decrypting a digitally encrypted signal from a communications satellite or cable network.

Channel Island milk.

(advertising) The awareness of a brand in a consumer who, without prompting, names that brand first when asked to list all the advertisements they recall seeing in a general product category over the past 30 days.

Alternative spelling of top of mind awareness

(physics) the antiquark corresponding to the top quark.

A desk having a flexible top, made of parallel slats, that rolls away when not needed.