Anything that's related to reproduction can be described as sexual. It's also used to describe an intimate kind of attraction that occurs between people.

Sexual reproduction happens in animals (including people) when a female's egg and a male's sperm fuse together and go through a process of cell division which results in a baby — or a litter of baby animals. People also use this adjective for things that are connected to or suggest sex, in both the "intimate contact" sense, and also the physical differences that define men and women.

Definitions of sexual

adj of or relating to or characterized by sexuality

sexual orientation”
sexual distinctions”

adj having or involving sex

sexual reproduction”
sexual spores”
existing or occurring between the sexes
having sexual differentiation
relating to only one sex or having only one type of sexual organ; not hermaphroditic
asexual, nonsexual
not having or involving sex
agamic, agamogenetic, agamous, apomictic, parthenogenetic
(of reproduction) not involving the fusion of male and female gametes in reproduction
reproducing by fission
neuter, sexless
having no or imperfectly developed or nonfunctional sex organs
vegetal, vegetative
(of reproduction) characterized by asexual processes
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adj involved in a sexual relationship

marked by or tending to arouse sexual desire or interest

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