rialú, m. (gs. -laithe).1. vn. of rialaigh. 2. Rule, regulation; control, government. ~ na tíre, the governing of the country. ~ gluaiseachta, movement control. ~ compáis, regulation of compass. Bord rialaithe, governing body. Greille rialaithe, control grid. S.a. comhla 3 (c), post31.