numeric
1,000; one thousand
The number one thousand. 一千 is the explicit kanji form; plain 千 is also common in many contexts, but this word represents the reading いっせん.
参加者は１０００人を超えた。
The number of participants exceeded one thousand.
一千メートル先で右に曲がってください。
Please turn right one thousand meters ahead.
Sino-Japanese numeral formed from 一 'one' and 千 'thousand'; いち + せん is pronounced いっせん by regular sound change.