2. (noun) valley, gap, hollow, depression.
E hia tau kē nei rātou e kaha ana te pukumahi ki te keri wāra hei whakamaroke i ngā whenua reporepo, ururua hoki, me te whakakīkī haere anō i ngā whāruarua i mahue mai (TTR 1996:46). / They worked energetically for many years draining the swampy and scrub-covered land and filling the hollows.
3. (noun) minimum (of a graph).