1An adverb meaning "at least" — indicates that an amount, number, or condition does not fall below a certain minimum. Very common in both speech and writing.
少なくとも一時間は待ってください。
Please wait for at least one hour.
資料は少なくとも三部用意してください。
Please prepare at least three copies of the materials.
少なくとも今週中には返事をもらいたい。
I'd like a reply by at least this week.
彼のことをよく知らないが、少なくとも嘘はつかない人だと思う。
I don't know him well, but I think he's at least not the type to lie.