noun
employment quota; number of positions available
Refers to the number of people a company or organization plans to hire, often used in job postings or recruitment contexts.
今年の新卒採用枠は昨年より少ない。
This year's graduate recruitment quota is smaller than last year's.
経験者採用枠で応募する。
I apply through the experienced-hire quota.
定員 is a fixed capacity or maximum number of people, whereas 採用枠 is specifically about hiring quotas.
Compound of 採用 (さいよう, 'hiring') and 枠 (わく, 'frame' or 'quota').