the full or proper portion or part allotted or belonging to or contributed or owed by an individual or group.

one of the equal fractional parts into which the capital stock of a joint-stock company or a corporation is divided.

to divide and distribute in shares; apportion.

to use, participate in, enjoy, receive, etc., jointly

The two chemists shared the Nobel prize.

to have a share or part; take part (often fol. by in ).

to divide, apportion, or receive equally. ?

on or upon shares

on the principle of sharing the profits or losses of an undertaking

They agreed to work on shares.