Definition of context sensitive in English English dictionary
Describes an application that can adjust its actions according to the current situation For example, an application with context-sensitive user input adjusts handwriting recognition according to the type of field (name, date, time, number, phone number, and so on) Source: NUIG
A characteristic of a user interface that adjusts program actions to accommodate the type of operation the user is currently trying to perform (pg 194)
In many programs, when you request help, you are provided help on the operation you area carrying out at the time That is, Help is "sensitive" to the "context" in which help was requested