furnish,provide,supply,render - give something useful or necessary to; "We provided the room with an electrical heater"

signal,signalize,sign

communicate,intercommunicate - transmit thoughts or feelings; "He communicated his anxieties to the psychiatrist"

wigwag - signal by or as if by a flag or light waved according to a code

semaphore - send signals by or as if by semaphore

heliograph - signal by means of a mirror and the using the sun's rays

flag - communicate or signal with a flag

whistle - give a signal by whistling; "She whistled for her maid"

call attention,point out,signalize

point,indicate,designate,show - indicate a place, direction, person, or thing; either spatially or figuratively; "I showed the customer the glove section"; "He pointed to the empty parking space"; "he indicated his opponents"

distinguish,signalize

mark - designate as if by a mark; "This sign marks the border"

singularise,singularize - distinguish as singular