A hyphen is the punctuation sign used to join words together to make a compound, as in 'left-handed'. People also use a hyphen to show that the rest of a word is on the next line.
英汉词典释义
n.
连字符, 连(字)号
There are no hard and fast rules about the use of hyphens in English.对于连字符号的使用, 英语中没有严格的限制。
英英词典释义
Noun
1. a punctuation mark (-) used between parts of a compound word or between the syllables of a word when the word is divided at the end of a line of text