sex

sex /ˈsɛks/ noun
plural sexes
sex
/ˈsɛks/
noun
plural sexes
Britannica Dictionary definition of SEX
1 
[noncount] : the state of having one of two major body forms (male or female) that occur in many species : gender 2
2 
[count] : men or male animals as a group or women or female animals as a group
— see also opposite sex
3 
[noncount] : physical activity in which people touch each other's bodies, kiss each other, etc. : physical activity that is related to and often includes sexual intercourse
— often used before another noun
— see also phone sex, safe sex