The First
First, Number One, Best
adverb, noun
The ordinal number prefix one refers to the first thing. This is the number one place you can get. In fact, it's simply the best.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
自分のけんこうが第一ですよ。
You should put your health first.
第一きぼうは二月十四日で、第二きぼうは二月二十一日です。
My first preference is Feb 14th and my second preference is Feb 21st.
あの有名なフグ一家の第一印象はどうでしたか?
What was your first impression of the famous blowfish family?