the person who holds the highest position in a national government:
a meeting of heads of state.
- Head of steam
noun phrase Full speed and impetus: Stephanopoulos acknowledges a steady series of peaks and valleys: ”You get up a head of steam and then—oops! What’s coming around the corner?” [1835+; the date refers to the actual boiler pressure of a machine]
- Head of the river
[hed-on, -awn] /ˈhɛdˈɒn, -ˈɔn/ adjective 1. (of two objects) meeting with the fronts or heads foremost: a head-on collision. 2. facing the direction of forward motion or alignment; frontal. 3. characterized by direct opposition: a head-on confrontation. adverb 4. with the front or head foremost, especially in a collision: She stepped out of the front […]
- Head or tail
see: can’t make head or tail