adverb, noun which may take the genitive case particle 'no'
for a while; for a short time; soon
Literary or formal adverb meaning 'for a little while' or 'soon'. Often used in written language or polite speech; in casual conversation しばらく is more common.
Please wait a moment.
しばしの別れを惜しんだ。
We lamented our brief parting.
He thought for a moment before answering.
He took a brief rest.
I'll be away from my seat for a little while.