What is Aid And Comfort?

Legal Definition
The constitution of the United States, art. 8, s. 3, declares, that adhering to the enemies of the United States, giving them aid and comfort, shall be treason. These words, as they are to be understood in the constitution, have not received a full judicial construction. They import, however, help, support, assistance, countenance, encouragement. The word aid, which oocurs in the Stat. West. 1, c. 14, is explained by Lord Coke (2 just. 182) as comprehending all persons counselling, abetting, plotting, assenting, consenting, and encouraging to do the act, (and he adds, what is not applicable to the Crime to treason,) who are not present when the act is done, See, also, 1 Burn's Justice, 5, 6; 4 Bl. Com. 37, 38.
-- Bouviers Law Dictionary
Legal Definition
Help; support; assistance; counsel; encouragement. As an element in the crime ot treason, the giving of "aid and comfort" to the enemy may consist in a mere attempt It is not essential to constitute the giving of aid and comfort that the enterprise commenced should be successful and actually render assistance. Young v. United States, 97 U. S. 62, 24 In Ed. 992; U. S. v. Greathouse, 4 Sawy. 472, Fed. Cas. No. 15,254.
-- Black's Law Dictionary
Legal Definition
Help; assistance; encouragement; counsel.
-- Ballentine's Law Dictionary