na-adjective, noun which may take the genitive case particle 'no', noun
unnecessary; unneeded; not required
Used for things, actions, or people that are not needed or are superfluous. Often appears in formal notices, instructions, and everyday speech. The cross-reference 不用 is a near-synonym but 不要 emphasizes lack of necessity rather than uselessness.
See also: 不用
不要な書類は捨ててください。
Please throw away unnecessary documents.
この書類はもう不要です。
This document is no longer needed.
不要不急の外出は控えてください。
Please refrain from non-essential and non-urgent outings.