2. (modifier) one-way.
Kaua e huri pēnei mai - he huarahi ahutahi tēnei. / Don't turn this way - it's a one-way street.
3. (noun) monoculture.
Ko te ahutahi he mahinga ahuwhenua, ahumāra rānei ina kotahi anake te momo kararehe, momo huakai rānei e whakatupuria ana (RP 2009:161). / Monoculture is an agricultural or horticultural practice where only one type of animal or crop is grown (RP 2009:161).