Not in the regular, usual, or established form; not according to official, conventional, prescribed, or customary forms or rules; irregular; hence, without ceremony; as, an informal writting, proceeding, or visit.
We must ensure that while eliminating child labor in the export industry, we are also eliminating their labour from the informal sector, which is more invisible to public scrutiny - and thus leaves the children more open to abuse and exploitation. Carol Bellamy
Judging by informal observation, most young Americans burn up their spare time buffing their emotional IQ and self-esteem with social media and non-stop texting. That's great for eye-thumb coordination, but what about the satisfaction of actually making something? Seth Shostak
My grandmother was a kind of Scarsdale, New York, society woman, best known in her day as the author of the 1959 book 'Growing Your Own Way: An Informal Guide for Teen-Agers' - this despite being a person whose parenting style made Joan Crawford's wire hangers look like pool noodles. Sloane Crosley