1 not clear, especially because of heat 朦胧的，不清楚的（尤其因为有热气）: The fields were hazy in the early morning sun. 晨光初现，田野一片朦胧。

2 difficult to remember or understand clearly 难以记住或明白的: a hazy memory 模糊的记忆

3 (used about a person) uncertain, not expressing things clearly （指人）不肯定的，说不清的: She's a bit hazy about the details of the trip. 她不大清楚这次旅行的细节。