Definition of 四大 (よんだい)
よんだい
                        四大
よんだい
yondai
noun
1.
university or college offering four-year programs(abbreviation)(abbr. of 四年制大学)
prefix
2.
the big four ..., the four major ...
Other readings:
                4大【よんだい】
                Related Kanji
| 四 | four | 
| 大 | large, big |