noun
buying up; buying all of something; reserving every seat/room
The act of purchasing the entire stock or reserving all available units, often leaving none for others.
See also: 買い切る (かいきる)
新作のゲームは発売日に買い切りされて、すぐに売り切れた。
The new game was bought up on release day and sold out immediately.
ツアーのチケットは一人で買
There are limits so that one person cannot reserve all the tour tickets.
noun
purchase on a no-returns basis
A sale condition where the buyer cannot return or exchange the item after purchase; often used in phrases like 買い切り商品.
この商品は買い切りですので、返品はできません。
This item is sold on a no-returns basis, so it cannot be returned.
noun
A one-time payment that covers unlimited or full access, as opposed to pay-per-use; common in software licensing and subscription models.
このアプリは買い切りで、月額料金はかかりません。
This app is a one-time purchase; there is no monthly fee.
Noun form of the verb 買い切る (to buy up / purchase outright), from 買い (buying) + 切る (to cut off / finish).