head of state

element (key component of sth); (chemistry) element; (math.) element (member of a set)

(military) marshal; commander-in-chief

upper house; senate; senior statesmen's assembly

senior figure; doyen; founding member; veteran

American dollar; US dollar

euro (currency)

yen (currency of Japan)

CE (Common Era); Christian Era; AD (Anno Domini)

unit (forming an entity); element; (in a residential building) entrance or staircase