Legal Maxim's

Salus populi est suprema lex
— The safety of the people is the supreme law.
Sciens
— Knowingly.
Scienter
— Knowingly.
Scire facias
— That you cause to know.
Scribere est agere
— To write is to act.
Se defendendo
— In self defence.
Secus
— The legal position is different, it is otherwise.
Semper praesumitur pro legitimatione puerorum
— Everything is presumed in favor of the legitimacy of children.
Semper pro matriomonio praesumitur
— It is always presumed in favor of marriage.
Sententia interlocutoria revocari potest, definitiva non potest
— An interlocutory order can be revoked, a final order cannot be.
Servitia personalia sequuntur personam
— Personal services follow the person.
Sic utere tuo ut alienum non laedas
— So use your own as not to injure anothers property.
Simplex commendatio non obligat
— A simple recommendation does not bind.
Stare decisis
— To stand by decisions (precedents).
Stet
— Do not delete, let it stand.
Sub modo
— Within limits.
Sub nomine
— Under the name of.
Sub silentio
— In silence.
Sublata causa, tollitur effectus
— The cause being removed, the effect ceases.
Sublato fundamento, cadit opus
— The foundation being removed, the structure falls.
Subsequens matrimonium tollit peccatum praecedens
— A subsequent marriage removes the preceding wrong.
Suggestio falsi
— The suggestion of something which is untrue.
Sui generis
— Unique.
Summa ratio est quae pro religione facit
— The highest reason is that which makes for religion, i.e. religion dictates.
Suppressio veri
— The suppression of the truth.
Suppressio veri expressio falsi
— A suppression of truth is equivalent to an expression of falsehood.