1.Definition: consisting of or involving two parts or components usually in pairs
"An egg with a double yolk", "A double (binary) star", "Double doors", "Duple (or double) time consists of two (or a multiple of two) beats to a measure"
2.Definition: having more than one decidedly dissimilar aspects or qualities
"A double (or dual) role for an actor", "Every episode has its double and treble meaning"
3.Definition: having two meanings with intent to deceive
"A sly double meaning"
4.Definition: large enough for two
"A double bed", "A double room"
5.Definition: twice as great or many
"Ate a double portion", "The dose is doubled"
6.Definition: used of flowers having more than the usual number of petals in crowded or overlapping arrangements
"Double chrysanthemums have many rows of petals and are usually spherical or hemispherical"
7.Definition: used of homologous chromosomes associated in pairs in synapsis