function

1. function (noun) — sense 1

Definition: What something does or is used for.

Example: Although they serve the same function across the plant, animal and fungal kingdoms, sperm and eggs vary wildly in their structure and biochemistry, even among closely related species. […] Many genes with reproductive roles also have antibacterial and immune functions, which indicate that the threat of microbial attack on the sperm or egg may be a major influence on rapid evolution during reproduction.

2. function (noun) — sense 2

Definition: A professional or official position.

3. function (noun) — sense 3

Definition: An official or social occasion.

Example: Our hotel is hosting a function for all the warehouse workers on the night of April 18.

4. function (verb) — sense 4

Definition: To have a function.

5. function (verb) — sense 5

Definition: To carry out a function; to be in action.

Example: Although the laying workers functioned in a queenlike manner, they were unable to suppress ovarian development as effectively as the queen.