v.intr. 1 (usu. foll. by to) (of a substance) stick fast to a surface, another substance, etc. 2 (foll. by to) behave according to; follow in detail (adhered to our plan). 3 (foll. by to) give support or allegiance.
[ F adhérer or L adhaerere (as AD-, haerere haes- stick) ]