noun
new world record
Used in sports and other competitive contexts to refer to a newly set world record.
彼は100メートル走で世界新記録を樹立した。
He set a new world record in the 100-meter dash.
世界記録 means 'world record' in general, while 世界新記録 specifically emphasizes that it is a newly established record.
Compound of 世界 (world), 新 (new), and 記録 (record).