Against, to, for, or by everyone; with regard to all parties, in respect of all people, states, etc.
Valid, binding, or applicable in respect of everyone; owed to or by all people, states, etc.; that confers or imposes a right or obligation erga omnes.
Early 20th century. From post-classical Latin erga omnes towards everyone from classical Latin ergā towards, for, with regard to, respecting (from ergo, after pairs such as ultrā and ultrō) + omnēs, accusative plural of omnis all.