Nolo's Plain-English Law Dictionary

Legal Dictionary Home

Need Professional Help? Talk to a Lawyer
Enter Your Zip Code to Connect with a Lawyer Serving Your Area
searchbox small
Sine Qua Non
Latin for "without which it could not be," an indispensable action or condition. Example: if Charlie had not left the keys in the ignition, his ten-year-old son could not have started the car and backed it over Polly's bike. So Charlie's act was the sine qua non of the damage to Polly's bike.


Need Legal Help?

Get Informed Check out our thousands of free articles on everyday legal topics--they're accurate, up to date, and written in plain English.
Do It Yourself With Nolo's easy-to-use books, legal forms, online services, and software, you can handle many routine legal tasks yourself.
Talk to a Lawyer Just enter your zip code to connect with a lawyer serving your area.
LA-WS5:0.9.22.120522.13848+