The Oxford Thesaurus An A-Z Dictionary of Synonyms - briefly adv.

1) concisely, tersely, succinctly, in a word, in short; bluntly, curtly, in a nutshell, in a few words, to sum up: Briefly, the plan is a complete non-starter. 2) momentarily, for a few moments or seconds or minutes, fleetingly, hurriedly, hastily, quickly: I stopped briefly at the post office on my way home.