What does 外観 mean?
外観 is a Japanese noun meaning “appearance, exterior, facade” in English. It is written as 外観 in kanji, がいかん in hiragana, and gaikan in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
Windows Media Playerの新しいスキンを入手し、プレーヤーの外観を変えてみましょう。
Why don't you try out getting a new Windows Media Player skin and changing the player's look?