1. [n]  an inclined surface or roadway that moves traffic from one level to another
2. [n]  a movable staircase that passengers use to board or leave an aircraft
3. [n]  North American perennial having a slender bulb and whitish flowers
4. [v]  stand with arms or forelegs raised, as if menacing
5. [v]  as of a snake
6. [v]  creep up -- used esp. of plants; "The roses ramped over the wall"
7. [v]  be rampant, as of a beast in a heraldic depiction
8. [v]  furnish with a ramp; "The ramped auditorium"
9. [v]  behave violently, as if in a great rage

RAMP is a 4 letter word that starts with R.

1. \Ramp\, v. i. [imp. & p. p. {Ramped} (?; 215); p. pr. & vb.
   n. {Ramping}.] [F. ramper to creep, OF., to climb; of German
   origin; cf. G. raffen to snatch, LG. & D. rapen. See {Rap} to
   snatch, and cf. Romp.]
   1. To spring; to leap; to bound; to rear; to prance; to
      become rampant; hence, to frolic; to romp.
   
   2. To move by leaps, or by leaps; hence, to move swiftly or
      with violence.
   
            Their bridles they would champ,
   
            And trampling the fine element would fiercely ramp.
                                                  --Spenser.
   
   3. To climb, as a plant; to creep up.
   
            With claspers and tendrils, they [plants] catch
            hold, . . . and so ramping upon trees, they mount up
            to a great height.                    --Ray.
   
   

2. \Ramp\, n.
   1. A leap; a spring; a hostile advance.
   
            The bold Ascalonite Fled from his lion ramp.
                                                  --Milton.
   
   2. A highwayman; a robber. [Prov. Eng.]
   
   3. A romping woman; a prostitute. [Obs.] --Lyly.
   
   4. [F. rampe.] (Arch.)
      (a) Any sloping member, other than a purely constructional
          one, such as a continuous parapet to a staircase.
      (b) A short bend, slope, or curve, where a hand rail or
          cap changes its direction.
   
   5. [F. rampe.] (Fort.) An inclined plane serving as a
      communication between different interior levels.