"Visitor" is a legal immigration status in the country that issued the visitor visa (Malaysia).
Malaysia....Types of Visa
Assuming your husband has a valid Malaysian multiple entry visitor visa with duration from July-18-2018 to July-18-2019 (12 months multiple entry visa).
Also, assuming each entry allows the visitor to stay in Malaysia for a maximum of 3months.....and your husband entered Malaysia on July 20th 2018.
If he overstayed in Malaysia after the 3months single entry and did not apply or approved for visitor visa extension beyond the 3months.......he will be out-of-status......and his Status in this case will be "out-of-status" in Malaysia.
If he either left after the 3 months (as multiple entry visa allows visitors to leave and re-enter) or got approved for visa extension......his Status remains valid as "Visitor" in Malaysia.
Refer.....
Generic Application Form for Canada (IMM 0008)......Principal Applicant’s Personal Details
Question 10
Current country of residence
From the list, select the appropriate information to indicate:
- The name of your current country of residence. Your country of residence is the country in which you are residing, provided that you have been lawfully admitted to that country.
- Your immigration status in that country (indicate one of the following):
- Citizen
- Permanent resident
- Visitor
- Worker
- Student
- Other
- Protected Person
- Refugee Claimant
- Foreign National
- Other: This section must be completed if you selected “Other” as a status.