Longman Dictionary of Contemporary English
Wiktionary
n. (context informal English) An early preview or look at something, especially not yet made public.
WordNet
n. a preview to test audience reactions
Wikipedia
Sneak Preview is an independently released album by the future members of King's X going by the name of Sneak Preview. Reportedly, only about 1,000 copies were pressed. The band was not very impressed with the results and may have personally destroyed about half of the pressed copies, making this album a very rare item.
The album has a definite early 1980s rock sound both songwriting and production wise. It does little to set itself apart from any other acts at the time and is also quite different from the distinctive sound they would develop a few years later as King's X.
However, there are a couple of seeds for future use planted here. The song "The Door" from this album was re-written lyrically and recorded for the Ear Candy album as "Picture"; "You're The Only One" was recorded for the Black Like Sunday album in 2003; and the instrumental break in the middle of "Inside Outside" was re-used on the track "I Can't Help It" from the Faith Hope Love album.
The song "Where's Everybody Going?" was frequently played during the live shows of Sneak Preview, often as the ending track. Some of the songs from this album are available as part of live bootlegs from that time. There were 5 videoclips released for this album: "Hang On", "Together", "Linda", "Inside Outside" and "Full Scale".
Usage examples of "sneak preview".
It was as if Spike and Abu had been granted a sneak preview behind the veil, a glimpse in which it was revealed that organized religion was a major obstacle to peace and understanding.
It was not just a sweet tale of romance as Panthera implied, but also a sneak preview of the Jaddayoth I intended to squeeze myself into.
The zig where Anna sat provided a sneak preview, a peek from the stone shrouded mountainside into the valley.