The terse, abbreviated writing style used in or as used in telegraph messages; speech that resembles this.

A telephoto lens.

(photography) A lens having a long focal length which produces a magnified view of distant objects.

Alternative form of show and tell

A television program which consists of several episodes that are broadcast at regular intervals. / A group of episodes of such a program.

telegraphic

mobile phone, cell phone

(idiomatic) A situation in which a person unsuccessfully attempts to contact another person by telephone and leaves a message instead, and in which the second person then unsuccessfully attempts to return the initial call and leaves a message for the first person, and so on as if the two are playing a game of tag in which the most recent person to have been left with a message is now designated as "it" (i.e. as the player now obliged to chase the other and to attempt anew to make contact).

(transitive, idiomatic) To function as a liability (for someone); to put into a condition of disadvantage. / (transitive, idiomatic) To serve as evidence which casts doubt upon.

(informal) telltale