Online Dictionary

deep in thought Explained

deep in thought at English => English (WordNet) Of Explained:

deep in thought
adj : deeply absorbed in thought; "as distant and bemused as a
professor listening to the prattling of his freshman
class"; "lost in thought"; "a preoccupied frown" [syn:
{bemused}, {deep in thought(p)}, {lost(p)}, {preoccupied}]