1. (adj) informal - it will be an informal occasion: será una cosa informal event, atmosphere

2. (adj) - most people were wearing informal dress: la mayoría de la gente llevaba ropa informal

3. (adj) sencillo -lla person

4. (adj) extraoficial, informal - the president made an informal visit to the hospital: el presidente realizó una visita extraoficial al hospital not official

5. (adj) - we had an informal arrangement to meet the following day: habíamos hablado de quedar el día siguiente casual