friendly

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Characteristic of or behaving as a friend.
• adjective Outgoing and pleasant in social relations.
• adjective Favorably disposed; not antagonistic.
• adjective User-friendly.
• adjective Informal Easy to understand or use for a specified agent. Often used in combination.
• adjective Informal Low in amount relative to a standard or regular circumstance. Often used in combination.
• adverb In the manner of a friend; amicably.
• noun One fighting on or favorable to one's own side.

from The Century Dictionary.

• In the manner of friends; in the way of friendship; with friendship.
• Like a friend; disposed to confer benefits; kind.
• Characteristic of or befitting a friend or friends; amicable; amiable: as, to be on friendly terms.
• Not hostile; disposed to peace: as, a friendly power or state.
• Favorable; propitious; salutary; conferring benefit: as, a friendly breeze or gale; rains friendly to ripening fruits.
• Pertaining or belonging to the Society of Friends.
• noun One who is friendly or acts as a friend; specifically, a native of a naturally hostile country who is not only not hostile, but who acts as a friend to a traveler, explorer, or the like.

from the GNU version of the Collaborative International Dictionary of English.

• adverb obsolete In the manner of friends; amicably; like friends.
• noun A friendly person; -- usually applied to natives friendly to foreign settlers or invaders.
• noun (Mil.) A member of one's own military forces, or of allied forces.
• adjective Having the temper and disposition of a friend; disposed to promote the good of another; kind; favorable.
• adjective Appropriate to, or implying, friendship; befitting friends; amicable.
• adjective Not hostile.
• adjective Promoting the good of any person; favorable; propitious; serviceable.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Generally warm, approachable and easy to relate with in character.
• adjective Inviting, characteristic of friendliness.
• adjective Having an easy relationship with something, as in user-friendly etc.
• adjective Without any hostility, as in friendly competition.
• adjective military Of or pertaining to friendlies (friendly noun sense 2, below). Also applied to other bipolar confrontations, such as team sports
• adjective number theory Being or relating to two or more natural numbers with a common abundancy.
• adverb In a friendly manner, like a friend.
• noun sports A game which is of no consequence in terms of ranking, betting etc.
• noun Person or entity on the same side of a conflict.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective easy to understand or use
• adjective of or belonging to your own country's forces or those of an ally
• adjective inclined to help or support; not antagonistic or hostile
• adjective characteristic of or befitting a friend
• noun troops belonging to or allied with your own military forces