shall / shal/ • modal verb (3rd sing. present shall) 1. (in the first person) expressing the future tense: this time next week I shall be in Scotland we shan't be gone long.2. expressing a strong assertion or intention: they shall succeed you shall not frighten me out of this.3. expressing an instruction or command: you shall not steal.4. used in questions indicating offers or suggestions: shall I send you the book? shall we go?