The noun share has 5 senses (first 4 from tagged texts)
1. (363) share -- (any of the equal portions into which the capital stock of a corporation is divided and ownership of which is evidenced by a stock certificate; "he bought 100 shares of IBM at the market price")
2. (152) share, portion, part, percentage -- (assets belonging to or due to or contributed by an individual person or group; "he wanted his share in cash")
3. (117) parcel, portion, share -- (the allotment of some amount by dividing something; "death gets more than its share of attention from theologians")
4. (19) contribution, part, share -- (any one of a number of individual efforts in a common endeavor; "I am proud of my contribution to the team's success"; "they all did their share of the work")
5. plowshare, ploughshare, share -- (a sharp steel wedge that cuts loose the top layer of soil)
Overview of verb share
The verb share has 5 senses (first 5 from tagged texts)
1. (24) share -- (have in common; "Our children share a love of music"; "The two countries share a long border")
2. (19) share -- (use jointly or in common)
3. (15) partake, share, partake in -- (have, give, or receive a share of; "We shared the cake")
4. (4) share, divvy up, portion out, apportion, deal -- (give out as one's portion or share)
5. (1) share -- (communicate; "I'd like to share this idea with you")