正(せい)

せい
noun / prefix
positive (sign), plus; correct
1. positive (mathematical sign), plus
The positive sign (+) in mathematics. Opposite of 負 (negative).
正(せい)の数(すう)。
A positive number.
正(せい)の符号(ふごう)と負(ふ)の符号(ふごう)。
Positive sign and negative sign.
2. correct, right, legitimate
Indicates something is correct, proper, or legitimate.
正(せい)解(かい)。
Correct answer.

正(せい) means positive or correct.

MATH USAGE:

  • 正(せい)の数(すう): positive number
  • 正(せい)の符号(ふごう): plus sign (+)
  • Opposite: 負(ふ) (negative)

OTHER MEANINGS:

  • 正(せい)解(かい): correct answer
  • 正(せい)式(しき): official, formal
  • 正(ただ)しい: correct (adjective)

NOTE: Different from ~製(せい) (made in/of).

general
Added 2026.2.2 19:21
09500/09511_sei