No end Definition 1 of 1Pro Tip 1/3Emotional Intensity Use 'no end' to express strong feelings about something. It adds emphasis to emotions. Her kindness touched him no end. Pro Tip 2/3Informal Expression 'No end' is informal, suitable for casual conversations rather than formal writing. I enjoyed the concert no end! Pro Tip 3/3Positive or Negative It can be used in both positive and negative contexts to modify the sentiment expressed. He was vexed no end by the constant delays.