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
Email is very informal, a memo. But I find that not signing off or not having a salutation bothers me. Judith Martin
I love a modern suit paired with a polo or cotton T-shirt... and then paired with leather sneakers, or cashmere joggers with a tailored blazer and a sleeveless puffer vest to get the ultimate informal and formal combination. Brunello Cucinelli
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
Africa's informal economy is one of the most innovative and inventive environments in the world. Yet it is an environment with little regulation in which workers are often exposed to hard conditions and live without a safety net. Richard Attias