1) разг. (согласие, мир) harmony, concord
2) (способ, манера) manner, way
3) муз. stop; fret (о струнных инструментах)
запеть на другой лад - to sing another tune
дело идет на лад разг. - things are going better, things are taking a tern for he better, things are beginning to tick
дело не идет на лад разг. - things won't get going, things are not going well, things are not moving, we're not making any progress
ни складу ни ладу разг. - neither rhyme nor reason