di ‧ vid ‧ er /dəˈvaɪdə, dɪˈvaɪdə $ -ər/ BrE AmE noun [countable]
1 . something that divides something else into parts:
a room divider
alphabetical file dividers
2 . American English a piece of land that separates traffic travelling in opposite directions on a main road SYN reservation British English :
Police saw his Mercedes speeding along the center divider.
3 .
dividers [plural] an instrument used for measuring or marking lines or angles, consisting of two pointed pieces of metal joined together at the top