a device for showing the operating condition of some system
a signal for attracting attention
(chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction
either of two lines that connect a horse's harness to a wagon or other vehicle or to a whiffletree
an indication that something has been present; "there wasn't a trace of evidence for the claim"; "a tincture of condescension"
a visible mark (as a footprint) left by the passage of person or animal or vehicle
a just detectable amount; "he speaks French with a trace of an accent"
follow, discover, or ascertain the course of development of something; "We must follow closely the economic development is Cuba" ; "trace the student's progress"
make a mark or lines on a surface; "draw a line"; "trace the outline of a figure in the sand"
copy by following the lines of the original drawing on a transparent sheet placed upon it; make a tracing of; "trace a design"; "trace a pattern"
make one's course or travel along a path; travel or pass over, around, or along; "The children traced along the edge of the dark forest"; "The women traced the pasture"
to go back over again; "we retraced the route we took last summer"; "trace your path"
discover traces of; "She traced the circumstances of her birth"
a visual representation (of an object or scene or person or abstraction) produced on a surface; "they showed us the pictures of their wedding"; "a movie is a series of images projected so rapidly that the eye integrates them"
a typical example of some state or quality; "the very picture of a modern general"; "she was the picture of despair"
illustrations used to decorate or explain a text; "the dictionary had many pictures"
a situation treated as an observable object; "the political picture is favorable"; "the religious scene in England has changed in the last century"
show in, or as in, a picture; "This scene depicts country life"; "the face of the child is rendered with much tenderness in this painting"
commanding attention; "an arresting drawing of people turning into animals"; "a sensational concert--one never to be forgotten"; "a stunning performance"
condition of heightened watchfulness or preparation for action; "bombers were put on alert during the crisis"
very attentive or observant; "an alert and responsive baby is a joy"; "caught by a couple of alert cops"; "alert enough to spot the opportunity when it came"; "constantly alert and vigilant, like a sentinel on duty"
(usually followed by `to') showing acute awareness; mentally perceptive; "alert to the problems"; "alive to what is going on"; "awake to the dangers of her situation"; "was now awake to the reality of his predicament"
not unconscious; especially having become conscious; "the patient is now awake and alert"