Definitions
1.AdjectiveGenerally warm, approachable and easy to relate with in character."Your cat seems very friendly."
2.AdjectiveInviting, characteristic of friendliness."He gave a friendly smile."
3.AdjectiveHaving an easy or accepting relationship with something."a user-friendly software program; a dog-friendly café; the use of environmentally friendly packaging"
4.AdjectiveCompatible with, or not damaging to (the compounded noun)."The cobbled streets aren't very bike-friendly.; Organic farms only use soil-friendly fertilisers.; Our sandwiches are made with dolphin-friendly tuna."
5.AdjectiveWithout any hostility."a friendly competition; a friendly power or state"
6.AdjectivePromoting the good of any person; favourable; propitious."a friendly breeze or gale"
7.AdjectiveOf or pertaining to friendlies (friendly noun sense 2, below). Also applied to other bipolar confrontations, such as team sports."The soldier was killed by friendly fire."
8.AdjectiveBeing or relating to two or more natural numbers with a common abundancy."friendly; friendly pairs; friendly n-tuples"
9.NounA game which is of no consequence in terms of ranking, betting, etc."This match is merely a friendly, so don't worry too much about it."
10.NounA person or entity on the same side as one's own in a conflict.
11.AdverbIn a friendly manner; like a friend.