Favour/ˈfeɪvər/ Definition 1 of 5Pro Tip 1/3Not Obligatory A favour is kindness without being forced or paid for doing it. She volunteered to proofread my essay, that was a huge favour. Pro Tip 2/3Unconditional Help When doing a favour, you should not expect anything in return. I can house-sit for you as a favour; just enjoy your vacation! Pro Tip 3/3Gratitude Expression It's polite to thank someone who grants you a favour. Thanks for picking up my mail - I owe you a favour.