A male (tree, gene, etc).
A son of any age.
A male of any age, particularly one rather younger than the speaker.
A male servant, slave, assistant, or employee
A younger such worker.
A non-white male servant regardless of age, particularly as a form of address.
Any non-white male, regardless of age.
A male child or adolescent, as distinguished from infants or adults.
A young male.
A former low rank of various armed services; a holder of this rank.
Heroin.
A male animal, especially, in affectionate address, a male dog.
Exclamation of surprise, pleasure or longing.
To act as a boy (in allusion to the former practice of boys acting women's parts on the stage).
A plant of the masculine sex.
An animal of the sex that has testes.
A human member of the masculine sex or gender.
A bacterium which has the F factor.
A male connector, pipe fitting, etc.
Belonging to the sex which typically produces sperm, or to the gender which is typically associated with it.
Having the F factor; able to impart DNA into another bacterium which does not have the F factor (a female).
Of instruments, tools, or connectors: designed to fit into or penetrate a female counterpart, as in a connector, pipe fitting or laboratory glassware.
Characteristic of this sex/gender. (Compare masculine, manly.)
Tending to lead to or regulate the development of sexual characteristics typical of this sex.