'Deep-laid' definitions:

Definition of 'deep-laid'

(from WordNet)
adjective
Secretly and carefully planned; "deep-laid plans"

Definition of 'Deep-laid'

From: GCIDE
  • Deep-laid \Deep"-laid`\, a. Laid deeply; formed with cunning and sagacity; secretly and carefully planned; as, deep-laid plans. [1913 Webster + WordNet 1.5]