To acquire, bring in, or introduce.
The ship took on cargo in Norfolk yesterday.
To begin to have or exhibit.
In the dark, the teddy bear took on the appearance of a fearsome monster.
To assume or take responsibility for.
I'll take on the project if no one else will.
To attempt to fight or compete with.
I don't recommend taking on that bully, since he's bigger than you are.
To (attempt to) dribble round an opposition player.
To catch on, do well; to become popular.
To show emotion, to grieve or be concerned (about something or someone).
To obtain the services of (a person) in exchange for remuneration; to give someone a job.
To have sex.