Going on for too long — longer than it should be, so that people get tired or bored. It works as an adjective (an overlong speech, an overlong film, an overlong meeting) and, less often, as an adverb (we waited overlong). This is a reviewer's word. It lives in book reviews, film reviews, and polite complaints about meetings and ceremonies. It is almost always about TIME rather than physical length; you would not call a river or a piece of rope overlong, you would say too long. And it carries a judgement, gently but clearly: "a long film" is neutral, "an overlong film" says the writer was bored and thinks the director should have cut it. In speech most people just say "too long" — "overlong" sounds like something written down, a little formal, a little literary. Note it needs no "too" of its own: the "over-" is already doing that job.

冗長的、太長的（多指時間上拖太久）