1. (noun) a line that marks the side boundary of a playing field

• out of bounds

2. (noun) an auxiliary activity

• avocation
• by-line
• hobby
• pursuit
• spare-time activity

1. (noun) a line that marks the side boundary of a playing field

• line

2. (noun) an auxiliary line of merchandise

• business line
• line
• line of business
• line of merchandise
• line of products
• product line

3. (noun) an auxiliary activity

• interest
• pastime
• pursuit

4. (verb) remove from the center of activity or attention; place into an inferior position

• break
• bump
• demote
• kick downstairs
• relegate

1. (noun) a line that marks the side boundary of a playing field

• touchline

2. (noun) an auxiliary activity

• spelaeology
• speleology

1. (noun) an auxiliary activity

• avocational
• hobbyist