single-line
adjectiveUK /ˌsɪŋɡl ˈlaɪn/
US /ˌsɪŋɡl ˈlaɪn/
Having just one line.
The teacher wrote a single-line answer on the board.
OTHER MEANINGS
2. A telephone or communication system with only one line.
The office still uses a single-line phone.
3. In computing, a piece of text that fits on one line.
Enter a single-line comment in the code.
4. A railway with only one track.
The village is served by a single-line railway.
5. A design or drawing made with one continuous line.
She drew a single-line portrait of her cat.