The minimum amount or requirement; the lowest acceptable limit or standard.
仕事を始めるには最低限の道具が必要だ。
You need the minimum tools to start the job.
入学には最低限の学力が求められる。
A minimum level of academic ability is required for admission.
安全のために、最低限のルールは守ってください。
For safety, please follow at least the minimum rules.
As an adverb meaning 'at the very least' or 'at minimum' (used to state what should be done at minimum).
最低限、挨拶くらいはしなさい。
At the very least, you should greet people.
遅刻するなら、最低限連絡はしてください。
If you're going to be late, at least let us know.
英語ができなくても、最低限のフレーズは覚えておこう。
Even if you can't speak English, learn at least the basic phrases.