Unwilling to work or use energy. He was too lazy to clean his room, so it remained messy.
Characterized by a lack of effort or activity. The lazy afternoon was perfect for lounging by the pool.
The lazy river meandered gently through the countryside.
(Computing) Of evaluation or loading, deferred until the value is actually required. Lazy evaluation can often improve performance by avoiding unnecessary calculations.
(Medicine, figurative) Under-performing or inactive; not functioning properly. The child wore a patch to strengthen his lazy eye.