Mary Decker Tabb, only a day after returning from Europe, broke the women's world record in the 10,000 meters tonight, running the distance in 31 minutes, 35.3 seconds.

Decker arrived home in Eugene Thursday night from a record-setting performance in Europe, where she ran the mile in 4:18.08 to reduce by 2.81 the world mark held by Ludmila Veselkova of the Soviet Union.

She signed up for an Oregon Track Club all-comers meet after reading about it in this afternoon's newspaper.

"It's a small meet and I thought I'd give them some support, so I signed up to run," Decker said. "It's the first time I've ever run the 10,000 on a track. I'm surprised the record was so easy."

The old world mark of 32:17.19 was set last year by Yelena Sipatova of the Soviet Union.

Loa Olafsson of Denmark had a hand-timed time of 31:45.04 in 1978. But that race was run with men, and therefore does not count as a record.

Tonight's meet was on the same track, Hayward Field, where Decker set a world 5,000-meter record of 15:08.26 at the Prefontaine Classic June 6.

On Wednesday, she set an American record for 800 meters at 1:58.34.

Asked about possible jet lag, Decker said, "I didn't feel it today, but I'll feel it tomorrow."

Another world record was set in the same race. Pat Dixon, 63, broke the world 10,000-meter record for women over 60, finishing in 44:51. The record had been 47:10.