(archery) The release of an arrow. / (obsolete) A state of laxity or indulgence; unrestrained freedom, abandonment. / (rugby) All play other than set pieces (scrums and line-outs).

(archery) begin shooting; release your arrows

(idiomatic) Not incarcerated or in captivity; not under control. / (slang, archaic) Out on a spree, or in search of adventure.

In a loose manner. / Not tightly. / Approximately. / Used to indicate an imprecise use of words; short for loosely speaking

The quality or fact of being free from rigidity, attachment or restraint; not tight, not firmly attached or taut. / A relaxed state regarding principles or accuracy. / Moral laxity; licentiousness.

plural of looseness

present participle of loose

not tightly attached or held

simple past tense and past participle of loose off

(historical) A con game played with a chain, belt or string that is laid down to form two open loops. The mark places a finger or stick in one of the loops to try and secure (fast) the chain when it gets lifted, but either loop can fast or fail to fast (loose) the chain around the mark's finger/stick depending on where the con artist decides to lift the chain.